Hello BeOurGuests -
I am sorry to hear that you have been having difficulties with the gallery image on eBay. Please note that the Gallery and Header images are the same image for most eBay properties, and if your Header image is showing on the listing, that is typically a good indicator that we sent your image along to eBay appropriately. It is possible there was some difficulty on the eBay side as we are not aware of any issues on our end that would indicate a problem such as you have described.
If the difficulty persists for you, please feel free to provide a few examples of where this occurs for you in a support case and we'll be happy to look into it further.