In this case I would definitely side with the OP...it boils down to AS changing someone's seat assignment at the last minute without permission from the passenger....at the very least the OP deserved to be given a reason...why wasn't the aisle seat passenger placed in the middle that was unoccupied? My wife and I do the window/aisle combo all the time....it's a smart seat selection strategy....this is not about playing a "game". I would drop a note to AS listens...I got moved to a different seat without my permission last month and they were never able to tell me why it happened....I didn't ask for anything but they still sent me a $75 ecert for the hassle and I eventually ended up in my original seat.