I was playing a few minutes ago after I noticed that my NCR rep along with I think every other was set to neutral and I dont know how to fix it,along with that when I travel the game autosaves on the previous location,not on the location I traveled to...Any ideas on how I can fix that ?
I did use faction armor (NCR) but I also switched to non faction armors from the courier's stash and my reputation stayed the same,also I dont see a reason for my usage of NCR armor affecting Powder Gangers,Freeside etc
I had the same issue before with the autosave system and using CASM didnt resolve it,the game only autosaves properly when I go through a door or something

Go back to an old save, if that doesn't work go on another character. If that doesn't work verify integrity of game cache, if all else fails uninstall then reinstall.