Sorry I haven't updated, I didn't get a chance to rewire it till today.
I took a differnt approach. I wired the output jack hot to the switch on CA and CB, the hot from the pickups to the pots and then hot coming out the pot back to the switch.
So now only in position 2 both volumes can control the output. Position 1 uses bridge volume and position 3 & 4 uses the neck volume.
It's wasn't important for me to be able to blend the neck and bridge pickup in position 2. All I wanted was to have the neck volume rolled off a bit so I can stay on the dirty channel and just switch between neck and bridge to go from a somewhat clean tone to full out kick you in the nuts.