@ E1vS :
8 - Do you use scopes on the weapons that miss a lot? Scopes have minimal range too and if you try to use them below that range they get terrible CTH. You can use '.' key to cycle between scopes, ironsights and "fire from the hip" stances. Each gives different results at different ranges so try them out and see if that is the problem.
Also, you may turn off inaccurate CTH display option in ini file at least while you are testing this, to give you a good idea on what different modes do.

Hello E1vS, welcome to the pit!


6) Perhaps the formulation is a bit misleading. The option '3 - Clean all guns' means that every merc in this sector will clean all of his own guns - not that the current merc will clean the guns of everyone in this sector.

Repairing an item to its current maximum threshold should also clean it.