Question for Mods about Score Calculation

According to your score calculation platform, I've gotten a 159 and a 162 on two of my recent practice tests.

On the first one, I got 76/100 questions right. On the second one, I got 81/101 right.

According to your chart on this link (http://classic.7sage.com/lsat-score-percentile-conversion/), those ratios are good for a 161 and 164, respectively.

Please tell me what to believe, because I can't take the confusion D: