Originally Posted by
OccasionalUser
Being sent back to AA was not a problem. The problem was that when I went back to AA, QR refused the rebooking by AA. The LHS-DOH was with QR miles.
That too me sounds like AA is not rebooking properly. If you misconnect on a through ticket, the responsible carrier will issue a new ticket for the new flight.
The fact that QR refused the rebooking highly suggests that AA merely book space on the later QR flight without issuing a new ticket for that flight. It appears their expectation is that you will use your original QR ticket to "pay" for this later flight. I think AA executed your rebooking incorrectly.