Hi Fozzy:
1. Go to the 'Store' tab, edit scrolling gallery, and position it from there. I'm not sure if that will apply to existing listings.
2. Don't forget that the Auctiva fee estimator will only be checking the latest published fees, it won't take account of any offers ebay are running. As for the 75c, can't really answer that without seeing what the fee breakdown was - it should show you in the estimator what the fee is made up of.
HTH.