"Load Parts Lightwieght" switch

Why does this switch turn on randomly? I have been workingwith one assembly for a couple months now its only about 40 partsor so. I dont know how many times I have opened this assembly andhad the switch randomly turn on. Then i have to go back, turn theSwitch off and turn every part back to resolved. There are a coupleother similar assemblies that i have run into the sameproblem.SolidworksAssemblies