Wow!
I have been having some of these issues, though I didn't have to do the whole revoke token / re-enable thing on Ebay. I already had my gallery set up the way I wanted it (colours, style etc). All I was trying to do was change the position of the scroller so it was in the middle of my text.
The issue I had with this is that the code provided doesn't work - it produced a very pretty pattern but no images.
I got around this by cutting & pasting the html directly from a listing that was working and inserting that into my template.
At first that didn't work either - then I saw this thread and selected "No" from the drop-down menu next to "Append Auctiva Scrolling Gallery to my listings" - all good now :-D