I don't get what you mean by deducting the difference but your abv is about 9.1. That's not too high for a doppel bock. It's solidly in the accepted range.
I had my first real taste of mine today. Kegged it 2/5. Pretty darn good. Very malty, good foamy head does fall off but never completely dissipates. Light chocolate, caramel, dark bread, very faint fig(?), good clean smooth beer, little to no alcohol presence on the palate but mine only clocked in at 7.2. I'm happy with it.
edited to upload image