It’s not exactly a bug, but I didn’t know where to post it so I posted it here, basically I was searching the ROBLOX forums and I realised that when you search the forums, the old forum categories still come up. Sorry if this is the wrong category.
The bug happens every time, it’s simple to reproduce, just go to the forums, search for something and then click the drop down on the “Forum” tab, then they appear.
It happens on the main website, i’m not sure about the gametest websites but I assume so.
Example of it: 
I’m assuming they just forgot to remove it, it’s not that big of an issue but I guess people may get confused, especially if they are new players.