FF and OP,

My Twitter isn't behaving where I'm at right now, what you said makes sense to a certain extent. I'll double check when I get to a faster connection.

I'm a little surprised that AA didn't send a confirmation email or tweet. I get both every time I change flights or dates, and a tweet when I change from my AAdvantage number to my BA number. Chat always asks me to confirm that I've at least got the email and usually has me do a quick check to see if things are all right.

Given the current state of airline IT(especially DL, AA, and TP) , I check everything any time after I deal with an agent.