You can think of it in a few ways but server 1 is often described as the best out of the 3 for roleplay and i am sure some cops don't just want to go onto server 3 and be dealing with gangs just doing drug runs. I think this will improve over time as the police force gets bigger maybe.
I think this needs fully clarifying. I have seen people banned that have escaped into a bluezone during combat and i don't see how it isn't exploiting. Just crossing the line and being unkillable is a little stupid. Obviously when someone does flee into it you cannot shoot them but it shouldn't...
I believe then it might be your Playback device then maybe have you got a headset you can set instead of the Realtek HD audio.
If this doesn't work i honestly have no idea mate. Hope it helps.
Has this come to a admins attention. Not this particular topic but there is way to much UNMC clothing out. I have played on this server for a year and not had one set.