Back on topic... has anybody else verified this?
He's got two mobs listed in his pseudo-combat log, and if my recollection of combat logs serves correctly, it's not always in the best chronological order. So playing the devils advocate here, it's entirely plausible that while the 1d6 of good damage is appying, it's just not showing on the preceding lines on the combat log.
I'm not saying I DON'T believe you. I'm just saying that your "evidence" might not be telling the whole story.