I agree with Grizzlybrew...sounds like the gas in poppet is sticking or just not seating correctly...pull, clean, reinstall...but like Grizz said, if you've mixed up a few poppets you might have some investigating to do.
Regarding the regulator adjustment, you note you "pull the knob out", suggesting you don't have the screw adjustment with set bolt that most regulators have. I read a few reviews on your type regulator and a few have complained about the pull knob stripping out. Perhaps yours is stripped? If so and the set up is new...have your vendor replace.
Best of luck.