issues with power door lock kit

So I was gonna help do a 2 door Power Door Lock kit for family today and well didn't make it over but here is what happened. They installed the door lock kit ( Protocol Kit with Module ) right now it works great when you insert the key into the door and open it unlocks both doors when you lock it with the key it locks both doors. Only works on drivers side... but the real catch is when you get out of the truck or inside and both doors are closed it locks the doors automatically. Easy way the lock yourself out of the truck ( 2008 GMC Sierra ) I'm thinking I need to check the wiring on the passenger side of the truck, both sides are the 5 wire and work great with the doors open, even works good after the doors are closed but not sure why it locks when you get in or out of the truck. Help guys I don't wanna spend all day trouble shooting a simple fix.

Disconnect the 3 non motor wires on the passenger side.