not to try and be a smart alec
, BUT have you by any chance clicked on the main forum subsection titles?
There are 5 main sections on what I see.
FOG - Info center
On the first four if you click on the title it will either expand or collapse all the subsections under that topic. On the info center there is an up or down arrow head in a box at the far right that does the same thing. So if you have a section collapsed all you see is the section title.
The forum software "remembers" the way the display was configured when you either logged out or were logged out by the system. When you come back to the FOG as a guest all the sections will be visible because that is the default. But when you log in the way it was when you exited takes over the display.
I "lost" a section or two this way myself