i have a weird problem. Lerts start with everything normal, 60 psi at the guage. turn on the water and the water flows normal, guage pressure starts to drop, all is well. Until the guage reaches cut in, 40 psi. thats where it gets strange, as soon as i hear the pressure switch close, the guage drops to 0, then the pump builds the pressure back up to 60. the faucet that was turned on during this slows to barely flowing for 3 to 4 seconds while the pump starts pumping back towards 60 psi. the pressure tank has no water coming out of the schrader valve and is showing 40 psi with the water off and the tank bled off.