Damage Reduction Stacking

[cytoc]

I was messing around with DR in an offline mod.

Built: 5 Fighter, 5 Annointed Knight, 10 DD and 10 CotW
Included the feats Grtr Resiliency, and all 3 epic DR.

According to the combat log, I'm only getting 15/- DR. Is the Annointed Knight DR meant to stack with DD DR?

[Kaedrin]

No.

AK DR stacks with Greater Resilience and Epic DR feats (same as DD). They do not stack with each other (DD & AK).