The function of the 3 Spider top micro switches

I looked my top over carefully last night and found 3 micro switches, all on the driver's side, none on the passenger's side. One is at the top of the windshield frame for the LH top alignment pin. I think most of us know it lowers the windows 2" at the start of the top down process. A second is located at the main LH hydraulic ram connection behind the driver's seat. When the top is fully down, its my understanding this one releases the power window controls back to normal operation (until the top is fully down, the windows can't be operated). The 3rd switch I found is located near the secondary hydraulic ram connection at the upper rear of the top. I don't know what this one does. Can someone explain?

I have another question about the seat pots. If only one is bad, would that prevent BOTH seats from going forward when putting the top down or would the other seat still move forward?