Sounds like you are trying to migrate from Vendio to Auctiva.
Auctiva adds the Scrolling Gallery to the listing at submission time; so if the conflict is not seeing it on the one-page lister, you won't.
If Vendio's Scrolling Gallery is on the listing after import, you would probably need to manually remove all the Vendio stuff, as I doubt Auctiva does that for you.
Danno