2002 Chrysler Town and Country light switch problem

I got a 2002 Lxi. Recently it has been acting wierd. When I open the driver or passenger door the parking, rear and fog lights go on. They never did that before. It does not have auto lights either. Now when I open the door and they go on, if I turn the light switch to parking lights then the fog lights go off but parking light are still on. If I then pull out the switch for the fog lights then all the lights go off just like the switch is set to off. If I turn the switch to full lights then they work fine and if I pull out the fog lamps they turn on. It is just like the Off and parking light/pull out fog setting is mixed up. Anyone heard of this problem and any suggestions what to do? I thought of disconnecting the battery and see if that will reset it. Any comments to help would be great!