I had two 8550W's installed two years ago, and for some reason the lights on the units have been turning themselves on (6+ times now) in the middle of the night over the last month. The only ways to turn these lights on is to open a garage door, push the wall switch light button, or movement within the garage (motion sensors). Last night I again checked that the garage was locked and dark, yet this AM I awoke to one of the motors lights being on again. Looking for help with this please.