Back when Zeagle began to manufacture their own regs, which were essentially Apeks regs with a change in the HP seat and orifice, I bought a new Envoy. When I received it, I attached an IP gauge and had results similar to what you are describing. Concerned, I called Zeagle, which at that time was here in Fl., and asked to speak to the reg guru. He said that with a new seat a slight creep could be expected, and there was nothing wrong as long as it locked up. I dived that reg for several years without a problem.