Pressure regulator bad????

I have a rear mounted electric holley blue pump. I have a inline filter before the pump and a canister filter after the pump and then 6AN braided line all the way up to the carb. i have a plate that mounts a single inlet duel outlet pressure regulator. it splits off from the regulator to each float bowl of my holley 750 dp. i have pressure gauges in both the front and rear fittings of the regulator manifold. i have 6lbs in the front portion and only 4lbs in the rear. they should be equal shouldnt they? i ordered a new billet alum holley regulator today and 2 new pressure gauges. hope that fixes the prob. i got the current regulator in a kit from summit and it looks pretty cheap.