I recently purchased American bock from truebrew. Followed the instructions to a T with one exception of adding 1/2 lb of brown sugar just to boost the og. When I took my OG reading it SHOULD be between 1.052-1.053. You would think that adding the sugar on top during the boil it would be closer to 1060. Its only showing 1040. Where did I go wrong? 5 gallons, maybe 5.2 gallons at the most.