I got the Citi AA card, changed my payment due date the minute I got the card in early September to 11/1 payment due date, so the statement closed on 10/4.
During September, I met my min spend around 10/1. I had called Citi and asked the rep when my miles would post as I had use AP and wasn't sure if that counted toward minimum spend. the Citi rep told me the miles would post on my NEXT statement.
In actually, my AA miles were deposited ON 10/4. Found out this info when I logged into my AA account to check on award miles info only to discover that my bonus miles have deposited. Yay!