I’ve seen the same discrepancies on my end , asked one time and they completely ignored me—sometimes patterns make sense and I’ve quantified those but ever so often exactly what you saw is what I see.
I had one theory:
That it was from readers who barely read—
Back in “the day” they said that depending on how much you read you could contribute more or less….so I wondered if that was the case. That’s still my hunch.
Happy June Trisha!! Keep well!!!