This one has me a bit stumped.

Flew round trip to LAS on US metal, AA code in paid F. Used my AA# during the booking process. At checkin, I asked the agent to swap out my AA account with my CX number. She printed the boarded pass and it showed CX number and OW status correctly. Days later I see the flight actually credited to my AA account. Not a big deal this one time but certainly something I'd like to avoid in the future.

Never had this problem in the past. From here out, I'll call AA/US shortly after ticketing. Unless someone has suggestions??