I am having a problem with my rigging, though I never had this problem before. I have a bunny head rigged. I created vertex group for each part of the head (neck, head, and ears). Everything works fine except for the head. I named a bone Head and when i move the bone, the vertices i put into the head group wont move, but for some reason the bottom of the neck moves. I move the neck bone, everything moves but the head vertex group of the bunny head.
Here is what im talking about: Watch Video