As for POL thread and that stuff...? I'm clueless. The tank itself is a female receiver and the thread is opposite of usual to tighten or loosen. I don't know what that makes it to be.
If it tightens turning counterclockwise that is the POL type fitting...the teflon tape trick may work to use your propane then get the tank fixed. BTW some male POL fittings also have an O-ring on them, is yours this type? If it just has the bullet shaped nose with no flaws, dings, or deep scratches it should seal up fine with a new valve or a seal replacement in the valve, if that is possible.