In an effort to illustrate the problem I have a couple of screenshots I grabbed. They show threads from other forums showing up when you are in the root Gal Civ III forum. This shouldn't happen. Right now there are not that many so it doesn't look bad but normally there are a ton from Star Control, Ashes, Sins, Other Stuff, etc. It makes browsing the recently active threads for Gal Civ III painful.
I apologize in advance if the images are super large or break your browser. The first one shows the root and then the green arrow points to a thread that is from the Ashes forums.
The second image is just my screen scrolled down to show some more threads that shouldn't be there. They are also noted with a green arrow.