I don't know how the hip switch works.  I know poser has a bug about wanting to the gens back on even when it's turned off when a pose is applied from the library, so people got in the habit of using the alternate geometry for the hip. It's a pain in the butt, but it's no big deal for users who know about it.

I cannot save the world. Only my little piece of it. If we all act together, we can save the world.--Nelson Mandela
An  inconsistent hobgoblin is the fool of little minds
Taking "Just do it" to a whole new level!