I'll go read asap, but first let me answer the Undead question.
In my games, I don't rule that undead sense that they're being detected, unless they have some form of anti-detection magic or ability. What I meant with the adventure going on if you cast this spell, is that if I were a character capable of casting such a spell, and it did end up showing me the existence of an undead threat, I would want to annihilate it as soon as possible.
I'm going to read your post now!
