Did you at least try to get seats?
Sometimes not all agents are very well informed... and it is better just to hang up and to call them again. Most of the AB agents are pretty friendly and hold times are pretty reasonable.
If you have entered your mileage number correctly, the computer should be able to see it and will not charge you any money when the agent requests a seat for you. They still have issues recognizing other OW elite numbers on line (at least in real time)... so it is better to call in. Even if the agent wants to charge you for the seat, s/he can't do it.
Call again and just said you want to book an exit seat, and the computer will inform the agent if s/he needs to charge you.
I am an AA EXP BTW.
Carfield