It sort of creeps over the on/off shut off switch.
Well now that we know roughly what you're talking about (sorta kinda) what do you mean by "creeps over" is yours moving? I've looked mine over and it has the one screw you mentioned in the front and then there is a lip that is at the rear (relative to the bike, not the rider's view when riding) that fits over a screw on top. I can only guess that it's not seating properly and is getting stressed either from improper mounting or fatigue from vibration also from something gone wrong. Perhaps you could show us photos from the side that we could compare to ours?
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Ohhh, we don't have that on Gen 1's.
What's this "we" stuff. You don't ride yours anymore.
Twits.
Black pots 'n' kettles me thinks.