So i'm booking fastpasses for the first time ever today, . If i already have the max booked for a park is there a way to still look at other availability for the possibility of switching something out without cancelling one that I already have? In one situation I have 1 Tier 1 and 1 Tier 2 booked, am I not allowed to see other Tier 1 availability until I cancel my 1st Tier 1 selection?