Every BSP i put in level doesn’t work. I can’t move it or anything, the wire frame around the shape detaches from it when trying to move it. And it won’t delete either, its frustrating the **** out of me. I’m using build 4.5.1, anybody having this problem?
Go to Editor Settings -> Miscellaneous and check if you have probably disabled "Update BSP Automatically " 
Yup that’s it, wtf is the point of having that?
When you have many bsp brushes in your level it will start to lag after you move something -> when you disable “update…” it will just apply the new position after you have rebuild the geometry (under der build tab).
I see thanks