I don't like the sound of folks tampering with the "goods" on shipment.
Did anyone have any legitimate reasons for opening the hood and messing with the fuel cap?
I have had some intermittent problems with my fuel cap though, it tightens on a ratchet, so there's no way to over-tighten it. But on occasions, it's a tough cookie to undo. It only takes a moment with some slim-line pipe grips I have, but I can't see any reason for it jamming like it has done now and again.
Anyway, it doesn't happen often but it could be a clue to yours getting broken, if the "tamperer" used excessive force trying to open it.
Good luck with the move and settling in Drew.