In all fairness, I was upped from Y to J at check-in, then to F after boarding (was in F on the manifest, but only found out when an extremely cute young lady tried to sit on my lap and we had to resort to finding the ISM to sort out who was...ehem... going on top ). So it was a bump-bump rather than a straight double-bump!

To the OP: Sorry - I do feel your pain, and I know I'm not helping much, but heck this is FT!