Quote - Wonder if it will mysteriously vanish in a week or two? 

More productively, I ask, how do the face morphs work? Are they each independent and complete unto themselves

I hope she does not vanish in a week or two. She just arrived in the store after years of work. ;)

They are each independent and complete unto themselves. I like doing it old school! My introduction to Poser was a over a decade ago with Poser 4. I liked the way the face morphs worked then. I don't see a need to make them over complicated. There are "expression" morphs that do combined facial expressions but, even those are independent morphs.