Hi Ice_Maiden,
If the images are missing from your active listings, it would actually make sense that we haven't been able to generate scrolling gallery images to go with those listings. For further assistance with the issues you described with respect to your auction images and scrolling gallery images, I recommend contacting our customer support team by completing the web form on the following page of our site: http://www.auctiva.com/help/requesthelp.aspx
Your use of Auctiva would not have anything to do with your listings randomly becoming searchable and unsearchable, your inability to revise your items, or your inability to log-in to your eBay account. Therefore, for further assistance with those issues, I recommend following up with eBay's customer support group.
-Mike