I thought I'd ask this first here as Im too scared to go on the AA forum!
My issue is seemingly a very strange reverse to the norm, in that I've made a booking on AA.com and from that booking can go in and select a seat for a BA sector but not for the AA sectors!
Does anyone know why this might be. I selected my AA seats at the time of booking, without looking into things in detail, assuming I could change at any time and it now seems I may be stuck in them!