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Motion sensor does not turn off when door is open

I have 3 identical Liftmaster 8500 openers, all setup with the same equipment, each has its own MyQ panel, and remote light. All three are mounted side by side. On one of the doors, with the motion sensor off and the door in the opened position, the remote light will still come on when I pass within the line of sight of the sensor window. When the door is in the closed position the motion sensor does not turn the light on when I pass the sensor window. It does not seem to matter if I switch the sensor off with the door in the open or closed position, it still works the same way.

The other two openers work like I would expect, if the sensor switch is off, the light does not come on whether the doors are opened or closed. 

Is there a trick to disabling the motion sensor so the light will not operate whether the door is in the opened or closed position?

Thanks

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