In my experience the digiswitch, if you hold the button too long to go to orange it goes into programming mode. This allows you to program the type of battery used on the switch. nicd/nimh or lithium. I suspect this is the issue you are seeing where it is not turning -OFF- I don't consider this a defect. My experience with the unit has been excellent. I wish it had a charge jack on the switch, but that is a minor issue to me.