I bought a yong heng compressor and was using it to fill a 68ci 4500psi ninja paintball/airsoft tank. After I shut off the compressor it makes a leaking noise until I unplug the tank and when I unplug the tank the disconnect is very stiff and makes a really loud pop, the compressor reads 3000psi but only filled the tank to around 1000. Any ideas what I’m doing wrong? Also the tank is new too so I’m not sure if there’s something I was supposed to do to the tank before filling it or not. The only thing I really did to the compressor is tighten some fitting and apply Teflon tape to the air output fitting.