If you pop the switch off (it shouldn't be unnecessary to remove more than the four teflon wires that connect to the switch, though I'd suggest removing them from the 5 lug strip they all connect to), you'll see that there's the nut, a lock washer, and then another washer with a bent tab in it. The bent tab on that washer sets the number of stops for the switch, and if you turn the switch fully counter clockwise, you can then experiment with finding the correct hole to set the number of stops (I believe it's the second or third hole, it's labeled "3").
The switches all come factory set with 3 positions, but sometimes that washer moves around and can relocate itself to give you those redundant positions.
-PB
