Haha, sounds like the bugs can come from any direction. Weirdly I never had problems with it; have done it twice on two characters who weren't even looking for it. Just passed the graveyard and hey look, something is happening.

Maybe that's the key. The quest bugs if you try to do it.

haha maybe it does bug if you try to do it... but... I want that amulet. this 'strange amulet' almost made my week by lulling me into a false sense of happiness when it allowed me to select it for enchanting, but then not enchant