While shooting, pressing any movement button interrupts your firing but does not move you. Furthermore, you are locked out from continuing to fire, even if you release and then repress LMB, until you actually do move.
After quitting the game, keybinds appear to reset. However, after making any change (even "changing" a keybind to the exact same key), the other controls all change back to the previously-set custom keybinds.