Last winter, we had sort of the opposite situation. They changed our plane from one that was the 2-3 arrangement to the 3-3 arrangement. My son and I were traveling, and had taken the seats on the 2 seat side, but when we got on the plane, somebody had been assigned to the center seat,which was awkward for us, because they were actually sitting in the window seat, which we prefer to have. I just hate when they rearrange the seating that we had paid for in advance.