[butterdezillion]

What is the “Rpt” column?

Do the votes normally get added in clumps, like 60,000 at a time - as, for instance, when a large precinct reports their votes? How many voters are there in a large precinct?

[Yosemitest]

I can't answer that.
All I can do is suggest

that you go back to the original article that I linked to
and follow their links.