I decided to settle with NCR, (yeah, don't judge me), but everytime i put my ranger outfit on, my rep with them resets, so i can't call for support and that sorts of things. For me it seems unlocical, that you can't wear their' outfits, without the rep reseting. Anyone who can help me?

I have had rep resetting for no reason before. If you're on PC, spawn this guy and alter your reputation. http://fallout.wikia.com/wiki/Testacles_the_debug_centurion

I think this is just a game mechanic, as the same thing happens to me when I wear BoS power armor.
Take it off and it should go back.

I have a NCR and BoS commander mod and I cant call in troops without taking off my armor first (its rep based).

What's weird is recently mine stopped doing that; I get to keep my positive rep.