Hello All -
We are not aware of any issues on our end that would prevent your images from reaching eBay or displaying on eBay appropriately and will need to have a look at some unmodified specific listings to see what is occurring.
Please note that if the header/gallery image you submitted with a listing is showing up in the header image area and not the gallery image area, it is indicative that eBay was unable to make a copy of the image for display in the gallery for some reason. You should be able to correct this problem in any listings that are affected using the eBay tool here.
If you are encountering a different issue or the difficulty persists, please file a support case letting us know the specifics of what is occurring for you - is it the actual Header image on the eBay listings or the Gallery image in eBay search results and please provide some sample item numbers where this has occurred so we can have a look into it.