Render and preview.  The second hair and skullcap cannot be accessed in the hair room.  But they still display and render.  Only the hair on the second skullcap is unaffected by the simulations.  It  moves with the figure because it's parented to its head, but it doesn't drape with gravity or blow in the wind or anything like that, because simulations don't affect it.  It just sticks out like a haystack.  The hair on the first skullcap is affected by simulations and behaves as you would expect.

I can make the second hair prop invisible via the hierarchy editor, but I really wish it worked like it used to with Poser 5 and 6.