I know for Hoop Dee Doo it is always 2 credits...but at the early show you can only get cat. 2 or 3 seating, if you wait till the 9:30 show you can get cat. 1!
All dinner shows are 2 credits..regardless of the catagory you are seated in. If you want to pay out of pocket..consider getting the Disney Visa..you will get a discount..Have fun