User blog comment:Chrismh/Aikatsu Friends Idols Plus and Minus!! ~Round 3~/@comment-3237624-20181226143030/@comment-5138366-20181226145715

I tried to re-count it, and I had the same result for Maika and Sakuya, but +1 for Kaguya.

(Mathematically, the total suma of the points of all girls should equal zero all the time - because giving one plus and one minus does not change the total suma (+1-1=0). That's one way of checking if some mistake could occur or not.)