What exactly is a divider switch? sorry I really do not know much. I see the divider, it has a stick coming out on each side (left and right) and it goes into a section on each side (left and right) that has a sensor only on the left side. I put the divider in securely (followed the path and it's in there snug) but top still won't go down. Is there a piece of paper or something I need to put in that area to make it more snug?