I see the problem but I don't have a answer.
In the gallery summary page the file number does not match the thumb image file number.
For instance.
http://clubadventist.com/forum/gallery/367/thumbs/5038.jpg
Does exist. As well as medium and full images.
But the summary page is linked to:
http://clubadventist.com/forum/gallery/367/thumbs/5040.jpg
Which is missing and incorrect.

Blue Man Group
There is no such thing as stupid questions. Just stupid answers