Hi SpunkyBob,
you should be able to see the gallery on your items in the Adult category when you are signed in to a verified eBay account and viewing any of them. I've taken a look at a few of your active listings and the gallery was operating correctly for me on the items I was able to check, so it is unclear what you may be encountering.
I suggest as a first step that you try clearing your browser cache and then logging back in to eBay and giving a few items a look. If you have specific items where the gallery is not showing, please file a support case from under the Help tab of the site letting us know a few examples of where you are running into this so we can look into it further.
- Craig