So what I can tell you is they gave us a letter with a bar code for people lining up at the turnstiles to get in. The ushers scan the letter and gave me a ticket the size of a credit card. We wrote our names and they took out pictures on the spot and we were inside in less than 5 minutes. Didn't need to line up to buy and we got skip it.
I'm not sure what the vouchers look like but from how you describe it it sounds like I got tickets.
Planning to go again in April for Disney world next time.