If you move the control surfaces THEN keep them still at the new position, do you get more than 2 lights on?
If you do then there appears to be a problem with your Voltwatch. The IC inside has 2 modes of operation, single LED or bargraph. It COULD be that the pin that selects bargraph is active
If you get a scatter of lights only during movement of the surfaces, then I reckon you've got a high resistance joint in one of your leads.