Originally Posted by
guv1976
Welcome to FlyerTalk!
The fact that AA has issued the tickets really has nothing to do with either of your questions. QR gets to decide whether it will through-check bags on separate tickets. Someone on this forum might know the answer to your transit question, but most likely people on the FT QR forum can answer both. I'll alert a moderator and suggest that this thread be moved there.
By the way, did you attempt to book both segments as a single award with your AAdvantage miles?
I did and when I was unable after looking repeatedly, I opted to book them separately, so that I could at a minimum have biz class for the US ==> DOH leg. The second leg is in coach.