My wife and I recently flew from PHL to CUN on AA, flight 805. I "upgraded" our seats from Main Cabin to Main Cain Extra. Our seats included extra leg room, power outlets, and complimentary premium drinks. When we ordered premium drinks, however, we were asked for payment by the attendant. I brought this to the attention of AA Customer Service when we arrived home, and we were properly reimbursed. I'm just confused as to why we were charged in the first place. Based on where we were seated, shouldn't the attendant have known that our drinks should be free? AA's seat privileges must be very confusing, if even the attendants don't entirely understand them.