One of mine is aimed higher than the other as well. I looked behind the fog light from the engine bay, I can see the adjustment screw thing that looks like the one for the headlights. I turned it many times in both directions and it didn't move a bit. So not sure if there's a way to adjust them or not =/
I don't think you can. Maybe the bumper is slightly bent out of shape. After I got my new bumper my fogs light up the road MUCH better; what ever they did I have no idea.