||1) Yes. They have no reason to lie. If they label it wrong there are repercussions. It happens and people get fired. There is more to be concerned in a private store.
2) true. and it is not edible either.
3) Not at all! Another Minhag in the creation stages, or should I say evolution stages.
4) I still forgot to ask. Be on top of me. We have over a hundred open questions. Thank God we were given an opportunity to help people. The Chayei Adam in his preface writes a beautiful parable that he uses to explain his inadequacies, and how by helping others through the darkness, he feels like he can somehow compensate for them. Read it! It'll be worth your while. (You'll need something to do during the Kol Nidrei Concert)