OHHHHHH!!!! Hang on a minute... Sounds like you had MYW tickets that you never used so they weren't technically upgraded but were replaced by MS with APs for MYW tickets that were never activated. If that's the case, you either have vouchers or nothing. Either way, you will have to go to a ticket window or a guest services window to to the exchange. You'll either exchange your voucher or you'll need your CC that you paid with and an ID and your
DVC ID (You'll probably need all those even for the exchange certificate). Those APs will be activated the first time you enter a gate. Is this what you did? That's what was throwing me off. You were never at WDW (yet) and had never entered a gate with ANY of the tickets, right? From your OP, I just assumed you had upgraded during a trip at a ticket window. That's what was throwing me off.