This is just a question about a show I bought... it says it is 38 minutes long but every time I play it, it's actually about 8 minutes or so...
Am I missing something or .. do I have to redownload the show??

Assuming the card has downloaded OK.

Go to settings (cogwheel icon in the menu bar icons at the very top of the iStripper app)

Check advanced settings.

Set "Show Duration" time to suit.

Set "Delay Between Shows" to suit

HTH