Hi Dimitri. Thanks for your message. I can see exactly what is pictured in your screenshot. The four options for photo gallery lay out. I have also looked over the templates and they are all correctly written (I even re-downloaded the templates from the sitefinity website to make sure they were correct), however the galleries do not show correctly, regardless of the fact that the templates are correct.
For instance Thumbnails + Details page appears like attached image 1 when selected.
So does Thumbnails + Overlay
Thumbnail strip + images on the same page appears like image 2 below
Simple list appears like image 3 (with the bullet points)
All details pages look like image 4 - no next or previous buttons, picture tightly in the top left hand corner of the webpage.
The template contents are correct, but they're not correctly controlling how the images appear.