So I have a small bug.

For some reason my armor rating is always going into negative values.

Even if I fix it with console commands gradually it goes back into negative values.

This also happens with my followers.

The combat mods that I use are Ultimate Combat and Duel.

So far I have no luck tracking the culprit.

I always clean my save with http://www.nexusmods.com/skyrim/mods/52363/?.

But still is not fixing it .

Any help will be much appreciated.

What is your AR stark naked?

Try this: Remove all armor, wait for any spell to expire.

Bring up the console and try the command:

player.forceAV DamageResist 0

That should reset AR to 0, then try to re-equip your armor. What's your AR after ???