Hi stoopidme,
Welcome to Auctiva! Your current listings have actually not been removed from eBay, rather they are just being "re-indexed" by eBay. When you sign up for Auctiva and the scrolling gallery is appended to your active listings, eBay must "re-index" your items to appear in the appropriate search results pages which, according to their help page, can take up to 6 hours.
Additional information on this fairly common eBay issue is available on the following page of eBay’s help index: http://pages.ebay.com/help/find/questions/wheres-my-item.html. If you have any further questions about this specific issue, I recommend you contact eBay’s customer support department.
If you have any additional questions pertaining to your Auctiva account, please file a support request using the appropriate link on our help page: http://www.auctiva.com/free-auction-software-help/help.aspx
-Mike