Ick; less than 24 hours to my flight to Europe, 12B and 12H open on the 763 and when I try to change seats I get the message "Your reservation is confirmed, but you will need to obtain your seat assignment from a gate agent at the airport. Please check in at a Self-Service Check-In machine at the airport and obtain your seat assignment at the gate."

Do I still have the seat I had? Will I make it to the mini-cabin? Is AA software about as bad as possible?