Back when Zok was busy killing those Chiroterae, he was getting too many notifications to keep a note of everything. On top of that, the notifications were distracting him from the fight so he ignored muted them entirely. That's why he wasn't aware that he had gained some control points from the creatures.
"But, according to index, the Chiroterae didn't have any control points then how did killing them give me so many points?" Zok mumbled to himself.
He wasn't complaining that he found what he was looking for. However, he wanted to know how he did get those points. He didn't have to think for long though, he had noticed it before. The details in the Index weren't absolute. Cero was an example of how off the mark the information listed in the index could be.
