There was nothing unusual about my seat choice that I know of, just next to my wife who was on a paid ticket while mine was using miles. I found out about the change when I was printing the boading passes. Printed Mrs. Chinstrap's pass and then found I was moved. I couldn't move her, the seat next to her was taken, and my aisle seat was moved into the perferred seating and was one of a only a few of the best seats according to seatguru. Could someone possible have been trying to be nice to me and not known I was seated next to my wife? The frequent flier miles came from a partner airline, so could they possibly have been trying to impress me?