a few general knowledge questions

[lncatch]

So when i was pressure cheking my car again today i noticed some things that seemed odd to me. one was that the pressure i was putting on the intake system was about 10 psi and the pressure was bleeding ito the crank case from my pcv valve, is this normal? Is it just minimal pressure loss or do i need a higher quality than stock or autozone to hold th epressure correctly. The othe ris that there was actually pressure in the crak case even after taking out the pcv valve. Is that normal like if a certain set ov valves is open can this happen or is that a sign of having a cracked head or something like that. if anyone has some insight on these matter it would be gratly appriciated