Earlier quoted context omitted.
I'm confused about what he means. "After careful review" means that a human double checked it right?
Yes, that's what that means. He's upset because a human didn't actually double check it, so Twitter is lying by saying that.
According to one EA Forum Moderator, there are actual people reviewing appeals, but the fact that they upheld my ban saying it was correct only to revert it 2 weeks after I stopped fighting them tells me their process is flawed.
My best guess is bans are handed out automatically based on whatever heuristic, but the human review merely checks the log generated by the automated system for rudimentary errors. Was my account the one flagged and not a different user by mistake? Yes. Ban upheld. (except not, when they gave my account back with no apology)