It's an icky feeling: you publish your non-exclusive or exclusive content with AC and then realize there is a glaring error.
I used to tell contributors that they would just have to suck it up and deal with it. Why? Because there is an article out there where I got some information mixed up and even though I went over it several times before publishing, I still didn't see it until I'd had a full night's sleep. When I emailed AC for help in correcting it, I received a hasty (bordering on rude) reply that with thousands of pieces of content, AC couldn't possibly edit within the contents of an article. They would alter a title if they needed but wouldn't change anything within an article. This was a long time ago but I still remember that reply and how blatant it was. So I apologized for the error in the comments section of my article only because it was terribly obvious.
Since then, every once in awhile a person will come into the AC forums and ask how to go about getting AC to edit an error. After having received the hasty reply I had, I was confused over and over when more knowledgeable contributors than I would tell them to email community@ if they needed a change on a serious error. ( A small error absolutely don't bother emailing them. Don't tie up their email for a simple typo.)
Mine was a serious error. Why was I disregarded like I was when these more experienced contributors were advising others to go ahead and email AC? No one knows.
An AC staffer assured me that usually, AC will fix problems if asked. If a particular contributor is constantly asking for edits, then they will be "encouraged" to up their proofreading skills but otherwise, there's no reason why I was regarded like I was by an unknown AC staffer. Maybe they were having a bad day or maybe they'd been bombarded with so many emails they snapped. I don't know. I don't care now really but at least we cleared up whether AC will do some edits or not.
Here's something to keep in mind, though. When you publish non-exclusive or exclusive with AC, always proofread, edit, and submit the very final draft. Mistakes do happen but ultimately it is up to you to make sure it is error free. Do the best you can with it so you don't have to worry about asking AC.