I have 4 day tickets with fast passes for each day. Depending on what time we arrive i may or may not go to the parks the first day. If we go to the parks on the first day should i upgrade my tickets before or after i use them? if i upgrade my tickets after will it mess up my fast passes for the other 4 days. I will have a 3 day ticket left but 4 days with fast passes. Will they cancel one of my day with fast passes? I hope this makes sense.