I'm going through Bryce Carlson's book Blackjack For Blood. In it he describes that the ace side count should be used for "betting purposes only." Does this mean that one doesn't incorporate the ace count into the true count? I'll illustrate my question with an example.

Suppose we're playing a two deck game and there's 1.5 decks left in the shoe. The running count is +9 and no aces have shown. Then the ace running count is +13. Should my true count be +9/(3/2) = +6 or should my true count be +13/(3/2) = +9?

Thanks for your help!