First off, I deleted DaProg's RTB because it was causing hosting problems, and then after I deleted it, LShift + A wouldn't work. Usually, that button combination would allow my player to move to the left while crouching, but this time, it didn't work. I think I think Ctrl + A was the hotkey I used for RTB.
Later, I tried to rebind the strafe left key to other keys and test out if crouching would work. It did, so I got very confused. Just to let you know, RShift doesn't work either. Please help, it's limiting my ability to build and do other things.