Deep Blue:
Unless something has just changed on HEM's side the BBJ rake is still being included in the overall rake. My rake numbers are way higher than the rakeback I actually receive from my affiliate because of this inclusion of the BBJ rake on HEM. Of course BBJ rake does not qualify for rakeback.
I don't have the time to to re-crunch my numbers right now so I'm not sure what you're doing. but everyone else in this thread has had the same issue.
As far as whether you should play the BBJ tables, the short answer is those tables are a huge rake trap. Other people have estimated the additional rake is equivalent to roughly 2-3bb/100. This is a pretty huge as I said. Anyway, one way to figure this is simply compare your total winrate (including rb and other incentives) at AP/UB to other sites.