Just finished brewing my second batch of beer yesterday in the AM, my concern is that even though I followed the instructions to the letter my O.G. was lower than what the kit listed. My first kit was the NB Caribou Slobber with an O.G. Of 1.042, which should have been 1.052, and then brewed the t-can & Bearcats wheat ale which should have had a O.G. Of 1.045, but was tested, and had a O.G. Of 1.036. What could be the issue or issues here. My final gravity on the slobber was 1.013 which was in the expected range. Maybe I should stop testing the O.G. At the start.