still having brake problems:(

I believe the master cylinder from doctor diff has no built in proportioning but not 100% sure. The wildwood is the only one in the system. No power assist, the weird part is that if I don't let off the pedal completely after pumping them up the pressure stays but if I release it the last inch or so it goes back to hardly any pedal after about 5 seconds. Almost feels like air is getting in somehow but I am at a loss on it. Also I've been bleeding the system with the pedal in the upright position is this wrong?