Nightmare trying to move 2.Had to do 1 at time.1 seat disappeared so we 3 rows apart, it was that or stay in FS full of touristManaged to get two together as per previous post. Noticed some better seats and was in the process of moving one of them over, but just double checked the other seat was still available whilst at checkout before submitting and that had gone. Very flawed system and risky moving two or more seats when having to do them individually.