Considering they moved me out of my 4A Y seat, at the gate, a couple of weeks ago to expand the Flex Y for a late booking passenger, what happened sounds ridiculous.

....as was moving me out of 4A, whereupon they played musical seats with me onboard, to expand the cabin when there was no one sitting in the whole of Row 3 on the flight. They then proceeded to ignore Flex Y pax in 4A as they didn't know he was one (antimacassar sans piping).