I started a Scotch ale recipe, which at first showed 14 pounds of grain would have an estimated gravity of 1.063 and a pre-boill gravity of 1.053. After tweaking the mash schedule and other things, I went to print out the brew steps and saw that the estimated gravity for both were 1.000. Now I can't get it to show any gravity. I deleted and re-add the grains, but it still shows 1.000. I tried the "adjust gravity" button but nothing makes any gravity reading show up. What happened?