reserving the right to reject orders exceeding ...
You were given imprecise information. Fidelity, like most fund sponsors, puts in boilerplate allowing them to reject any purchase, including a purchase via an exchange if they feel it would disrupt the fund. But not sell orders. If they did, the funds would no longer be classified as OEFs.

An open-end fund is required by law to redeem its securities on demand

https://www.sec.gov/rules/proposed/2015/33-9922.pdf
Based on the purchase dollar limit you were given for FCNTX, and the limit that I actually hit on a very new and very small Fidelity fund, it looks like Fidelity sets its fund limits at 0.1% of AUM. (M* shows FCNTX as having $139.5B, or roughly 1,000x the purchase limit.)
Regarding redemption in-kind, Fidelity (or any fund company) would distribute securities owned by the fund. Obviously if the fund were to sell some securities just to purchase other ones to hand you, it might as well hand you the cash since that would be no more disruptive.
...
According to the latest semiannual statement, Fidelity Contra redeemed 293,065 FCNKX shares in kind, worth $5,071.454. It does happen.

'Imprecise', well, sort of. It does appear to be an online issue and an editing problem, said the editor. (No one has said anything at any point about purchases.)
Today's trade-block message says
(009073) The order you have entered exceeds the dollar amount that may be traded in the mutual fund as specified in the prospectus. Please review your order or call a Fidelity representative at 1-800-544-6666.
So I used chat to talk w a rep who researched and then reported
Purchases, exchanges, or redemption cannot exceed $500,000 per day. Anything over that requires a call in request which will even need approval from someone higher up than me.
to which I said 'So the text does not exactly mean what it says; I suggest a change to yada-yada "greater than $500k cannot be accomplished online but require human approval ..." and he said he would so note that and escalate it. We'll see. I cited the SEC footnote.
Plus I sent email just to get something more official in writing.

To buy a house costs more, but to rent an apartment in a big covid-wracked city costs less than before the pandemic in many cases:
https://cnbc.com/2021/05/08/us-cities-where-rents-are-going-down-apartment-guide-report.html
https://zumper.com/blog/rental-price-data/

Our state (MI) sets spirit prices for some weird reason. Retailers can charge more if want - but rarely do. Overall, Scotch hasn’t moved much over past several years. One of the better values is Dewars 12-Year at $30 - a noticeable cut above their popular White Label. JW Black, a favorite of mine, runs $40 - occasionally $2 less. Aberfeldy (single malt) at $40 is the best buy going IMHO.
Services seem to be where the prices have risen the most. Noticed big jump picking up a few shirts I had laundered recently. As I remarked on another thread, there’s a 2-3 week wait in our area for car / truck repair. A $335 bill for replacing a front wheel bearing on my pickup nearly knocked me over. But when I checked online, the price was right in the ballpark.

@lynnbrolin2021:
In November's Commentary said:

Taxes will have to be paid on this portfolio as required minimum distributions take effect so I want to be more conservative in this portfolio, and more aggressive in a Roth IRA.

I believe @davidmoran linked this portfolio planning tool that does a pretty good job of allowing the inputs (your numbers) to be iterated for optimization...tax optimization being one output. Might be helpful.
link here:
https://i-orp.com/Plans/extended.html
You mentioned utilizing a Roth conversion strategy.
I like to remind myself that the best time to execute Roth conversions might be during times of market pull backs. During times of market pull backs equities are temporarily undervalued, especially aggressive equities. So don't hesitate to convert TIRA shares (especially those that are conservatively positioned) as a result of a down market since you may actually have the opportunity to buy more Roth shares while markets have pulled back.
This makes Roth conversions not only a great option when your income is low from a tax perspective, but also a great option when markets are under performing from a valuation perspective.

Thanks for mentioning; I hadn't looked in a while. How about NEAIX? You'd have to be convinced about tech, though!

NEAIX is more growthy and multi-cap (it’s about evenly split between large, mid, and small caps) than I’m looking for. Has a higher max drawdown and lower upside/downside ratio.

MSSMX and NESGX are the two Fido NTF SCG funds that always end up being my final two funds to select from after screening that cat.
NESGX is more expensive, less volatile and similar TRs over standard interim periods, and a very worthy candidate in this cat.

The institutional class, NESIX, has a lower ER than MSSMX and Schwab only requires a minimum investment of $2500/$1000 with a TF. (Fido, unfortunately, has a $100K minimum.)

MSSMX and NESGX are the two Fido NTF SCG funds that always end up being my final two funds to select from after screening that cat.
I owned MSSMX for part of its 2020/2021 heyday move. It started to crash in 1Q/2021 and I sold it well UP, and before too much damage was done, moving proceeds to ITOT. It continued to go DOWN and then sideways. I have recently re-opened a position in it but only 1/2 the value I previously held in it. VERY volatile fund but very rewarding LT. Expecting a BIG pop to the upside in the coming months.
NESGX is more expensive, less volatile and similar TRs over standard interim periods, and a very worthy candidate in this cat.

Nobody needs to know all the stuff they want to know. Whenever I'm required to give an email address on a web-form in order to proceed--- that's why I have a spam email address with false EVERYTHING in it. False name, gender, address, planet. I like to have some fun with it, often. Address? Same as Elwood Blues: 1060 W. Addison.
https://foursquare.com/v/wrigley-field/40dcbc80f964a52081011fe3?openPhotoId=51c8a543498e037455e74f49

computers are largely cheaper in many senses compared w the last time I needed to upgrade ... what is your timeframe?
wine and spirits, some
many TVs, depending on when you are comparing (1y ago ? for everything)
some housing, in less "desirable" locations (a tautology w RE)
many paid services, lawnwork etc., has gone up, but it is not as though of those guys are getting rich, so do we begrudge them this new labor economy?

Thanks, David, for pointing out REMIX / BLNDX in the NOVEMBER Commentary. I used to have it on my watchlist, but apparently it had fallen off. Held up real nice in March 2020 (MAX DD of -9.3%).
Managed futures (50% of the fund) are usually a bit of a black hole in my mind, but at least "The positions can be in stocks and fixed income, as well as currencies and commodities."
If REMIX can provide annual returns somewhat similar to FMSDX, but with better downside protection, then it could be a find.
https://www.mutualfundobserver.com/2021/11/standpoint-multi-asset-fund-forcing-me-to-reconsider/

I've looked into this fund as a domestic micro-cap growth fund as I don't need another small-cap growth fund.
http://portfolios.morningstar.com/fund/summary?t=NESGX&region=usa&culture=en-US
M* has given it five stars. It has been a top quarterly performer in the WSJ at least on one occasion that I can remember (one was the April 5, 2020 edition, "Hanging In: Stock Funds’ No. 1 Manager Gained 12.8%." There may have been a couple of other occasions, but I can neither find nor remember.
If you don't have a small cap growth fund, this may be a good option as it has been a good performer for the last several years.
From Needham:
https://www.needhamfunds.com/commentary-insight/in-the-news/?news-category=all&news-topic=all&news-year=all
https://www.needhamfunds.com/mutual-funds/small-cap-growth-fund/
Another article:
https://www.businesswire.com/news/home/20210311005645/en/Needham-Small-Cap-Growth-Fund-Wins-Two-2021-Refinitiv-Lipper-Fund-Awards

10 percent, ya. that's rich. I'd feel lucky here if it were only that much.

Oops - Parnassus is NOT yet showing end of year on all funds

I called them last Thursday and they told me the distros would be "soon" ... which makes sense since they tend to pay in mid-to-late November (18/19-ish this year I think they said).

Last year the SEC temporarily suspended trading of Zoom Technologies (ZOOM) partly because investors were confusing it with Zoom Video (ZM). Zoom Technologies also had not publicly disclosed any financial information since 2015.

From Saturday’s WSJ - Meta Who? :)
“A Canadian company’s stock surged recently. Investors apparently confused it for the rebranded Facebook. Shares of Meta Materials Inc., a material-science company with the ticker symbol MMAT, rose 8% over the past two days. While Meta Materials appears to have little relation to Facebook Inc., it soon will have a similar corporate name.”
https://www.wsj.com/amp/articles/meta-shares-surge-no-not-facebooks-meta-11635516376

The greater fool awaits...... wanna buy a bundle of 101 bored ape NFTs? Up to 24 million last time I looked.

We're live with several new features in MultiSeach: Decadal Returns, Ratings, and Display Periods; After Tax Returns and Ratings; and Adjustable Column Widths.
All described here. I also hope to have an expanded piece in the November commentary.

Wonder what others’ thoughts are on this fund which is classified by Lipper as Small-Cap Core and is a Great Owl over 3/5/10 years?
It has a five-year upside capture ratio of 112.86, downside capture ratio of 63.68, and max drawdown of 16.24%.
Max drawdown over its lifetime (since May 2002) is 35.75%.
The investor class NESGX is a bit pricey with an ER of 1.89 plus 12b-1 of .25 but its institutional class with ER of 1.22 is available at Schwab with a minimum of $2,500/$1,000 (IRA) and the usual TF.

Terminology becomes a confusing issue in these kind of threads. "Short Term Bonds" is a category of M* and permeates search functions at various brokerage houses for competing funds in that category. Short Duration/Limited Duration is often a descriptive term, in titles of various funds, and can often apply to almost any category in which duration is being emphasized. Even the term High Yield can be confusing, often describing credit status references of junk bonds, but occasionally describing the amount of yield within any category of funds. In my cash alternative account, used as an alternative to bank accounts, I often use DHEAX (from the M* category of short term bonds), but it is predominantly a securitized asset fund that is very risky for the category, but I relate to it more as a nontraditional bond oef, with short duration. I often use RPHIX/RPHYX, which M* categorizes as a High Yield bond fund, but with very short duration--one of the least volatile and smooth performing funds I own and I consider it a good alternative to the category of Short Term Bond funds which generally offers too little yield with higher investment grade bonds. (RPHIX/RPHYX has restricted/limited access) Another fund I often use for alternatives for bank accounts, is FPFIX, a short duration low risk from the nontraditional category. I prefer FPFIX over its more well known cousin, FPNIX, which is a very good and low risk short term bond category fund. (note FPNIX is in a limited access status).
With all of that said, I also use a lot of short duration bond oefs in my more risky IRA holdings, that mostly have junkier credit ratings, but often in more of a "trade" role. In 2021 I have use IOFIX, SEMMX, several FL/BR funds, etc. which often provides higher yield and higher total return. In the multisector bond category, even venerable funds like PIMIX are very short duration, along with it's PIMCO relative PEGIX. At any rate, terminology can often be confusing, so the OP may want to more specifically define what he is looking for, and what role he wants those funds to fill in his portfolio.