Good luck with that, if you try in the relocation window they won't be able to do it as "someone else already has that seat", no shit! Also if a seat is unallocted for you to swap they can't stop someone else picking it. I you wait until after the window they will say you need to wait until next year. I would contact the club before the window and said know swaps are complicated, and ask what they suggest. You need a techie to sort you out while the system is not live.