I just can't figure this one... sorry. I have 5 days passes for 2 of us going and no tickets for 2 of us. I want to get stay and scream passes, but can i get 4? when i go to checkout at the univeral ticket website it lets me have 4 tickets at the reduced price, even though i only have 2 day tickets purchased. can i do this? or will i have 2 unuseable tickets? thanks.