Why do OG Vocabulary terms not list content?
I waited a few days on this to see if anyone posted a solution but no luck.. 

I've never had any luck with og_vocab and instead use a content type as a group type and use that just like taxonomy. This is possible by using entity reference fields that use entity reference views for values instead of a taxonomy field. But the "taxonomy term" ie. Field value must be set before hand as far as I can tell.

If this solution, and I actually like it a lot, sounds like it could work, I can write up a more detailed guide.