Again, many of these actually clarify weird situations, which is good, but some of the FAQs are CLEARLY already answered in the standard rules (often in multiple places, and consistently).

Q: Does FNP stack from multiple Tzeentch Warpflames?
A: Have you ever read ANY entry in ANY codex that mentions Warpflame, because they all say clearly that the FNP result does stack? Still, I think we'll devote one of a limited number of answer spots to this question. Good job, everyone! [pats themselves on the back and sleeps soundly that night].