Obviously I still don't have something right with the GridMarket set-up because I signed in as a user and it's pretty strange. I did upgrade the user account first.
What occurs is there's only one page to create a post or add an item for sale. I cannot access the themes or anything else because the dashboard doesn't show up. None of the categories that I created for GridMarket show up.
How do I make the client side of GridMarket work while also ensuring that the client gets the full benefits of WPMU and GridMarket?