I booked a flight for later this week using AS miles that includes a domestic business class (a319) segment on AA. I am unable to select a seat and it says they will be assigned at the airport. The seat map shows all seats as unavailable on AA and as occupied on Expert Flyer, yet Expert Flyer still says J1. AA is still selling 1 ticket so that matches the J1 on Expert Flyer. Any thoughts on if this is a potential overbooking situation or perhaps something else?