26-07-14, 09:05 AM
Yes and yes.
The middle screws adjust the reflectors left and right, the top ones do the vertical adjustment. it sounds as though you may have wound one of the screws completely out, though I'm surprised a bit of clockwise hasn't persuaded it to relocate again. Alternatively, it may be the reflector has popped off the ball mount (bottom left). Either way, taking it apart isn't too difficult and gives a good opportunity to clean the insides.