Did AMC cut the “I shoulda yelled two!” line?
Not in the least.
I’m not an idiot. I just play one IRL.

AMC went to hell when they allowed advertising during movies.
Last week I watched Planes, Trains, and Automobiles, as has become a Thanksgiving tradition for me. I noticed it was airing on AMC, so I decided to watch it there rather than paying to rent it. They completely butchered that movie as well. I understand they need to mute the f-words in the rental car scene, but they went way beyond that. They edited out the gaps where the word had been, so you couldn’t even see Steve Martin’s mouth where he would have said “fucking”. But even worse, they cut away from Edie McClurg when and just showed a wall with the rental company sign on it when she said “You’re fucked screwed”.
They also completely removed the part where Del points out that Neal plays with his balls a lot (“Larry Bird doesn’t do as much ball handling as you”). I guess that plausibly could have been cut for time.
I learned from my brother who works in Hollywood that when shows that originally aired after the “family hour” (after 9pm, or after 10pm, depending on your time zone), move to syndication, “edited for syndication” copies are produced, and they are sold as packages that networks can air whenever they want-- which means they might get aired at midnight, but it’ll still be the PG version created for syndication.
So sometimes when a show like Law & Order has a bunch of words edited out when you watch it at 2am, it’s not because they were OK in 1998, but are no longer-- it’s because they were not OK at 10am, and still are not.
It is still true that religious-leaning channels have created “special” versions of shows like Judging Amy, that have episodes missing as much as 12 minutes (out of 40 in a “1 hour” show), and whole episodes missing from the run.
I’ve noticed that I lose sound on a word or two regularly on many channels. Perhaps it’s as simple as a buffering issue from your provider or a short in your wiring.