I currently have a Fla. Seasonal Pass and want to go to Disney during one of the black out dates. I want to upgrade the pass to a regular Fla. Annual Pass. I am pretty sure I can just pay the difference between the cost of my Seasonal and the Regular AP. My question is this: Can I put a one day MYW ticket I have towards the price difference and pay the balance? I tried calling Disney and got no where with the CM. Anyone else have any similar experience?