Originally Posted by
number_6
If you were on AA codeshare on the MX flight, then the AA limit applies. If your ticket says MX instead of AA for the flight back then the MX baggage limit applies (and AA owes you nothing, except an apology for not alerting you to what you were buying). It sounds like you were not on the AA codeshare -- otherwise AA would have reimbursed you automatically for this error. Sometimes it makes a big difference what code you book with (even on the same plane!).
What you stated is correct.The problem is that I didn't have a ticket but a locator number. I call American Airlines and they explained that the rules depended on how the ticket was billed, which codeshare. I asked for a written copy of the rules and they refused to send them to me. They stated it was complicated and too large to send. I would have to get the info from them. They told me that I could take 2 bags per person. If that was wrong the mistake is theirs and they are responsible.