Back to School - Law task (Cops and Robbers) tracker issue?

I don't know if anyone else experienced this, but I've killed around 70 thieves yesterday and had a B grade, so I played a few more games today (+30 kills) and my grade is still just a B.
At this point I'm pretty sure I've gotten over 100 kills in rooms with at least 10 or more people, but my grade is still not A.
Anyone else having this problem?

Edit:
Since then I played a few more games (obviously more thief kills) and I'm still grade B.

Comments