I dont know what category to put this under but why does your nps scoring description not outline what a score of 8 is?
also why is your scoring different the standard scoring of nps?
I am pretty certain an 8 is considered a “Passive” response. This means that this respondent isn’t included in the calculation for your score.
This document on NPS helps explain how SurveyGizmo calculates their NPS question:
It seems to be the same as what is described in this link:
I hope this is helpful to you.