掲示板 Forums - Mastery Levels not accurate in new vector schedule

Not sure if I'm just understanding something wrong, but I thought the schedule overview page would show the mastery levels for the words and the selected vectors in this schedule.

I made a new schedule with a new vector, that I never used before. However, after quizzing for a short while, I have already several items in Mastery Level 9.

The mastery level intervals are set to the defaults, so I'm not sure what could be causing this.