I'm going through the first product in a copy edit. I've found a few concept errors as well, so I've started a list.
Nephilim: Nephilim are actually balanced between sin and vitrue, the mid point in their fall. In the main book, first printing, they have essentially the same personality as Demons of Sin and Cambions, which is boring.
Gaerydd: I say Gaerydd has no aristocracy. That's not true. They have an aristocracy of greatly reduced power, which essentially is in charge of military musters. the fact that they don't overthrow the theocracy speaks to the real power of the Church.
Hegarion: I say a few times the Church claims Hegarion used only divine magic creating the elemental wonders. That isn't true. They know he was a wizard, they just know he created a lot of holy items (many are cherished Church relics). So they know that he wasn't a witch, and he existed before the current ban on magic, so he's sort of grandfathered in. (They ignore the fact that magic had been banned once before).