All sub-forums have twice the amount of pages they actually have.
Here's an example: as of now, the Social Club has 15 pages when in fact, it only has seven. Page 8 has nothing in it. Then from page 9 and on, it is a repeat of all the topics it has. And this is how it is with all sub-forums (or at least the ones that have many pages on them; the ones with little pages don't have this weird glitch).