Honestly I thing this was at the time already very tricky. And we concluded that at the time there where already some mistakes in this calculating. For a small group it was correct but for others it was not. So I guess after the hard fork 19 it still has some flaws and bugs.
RE: Steemdollar.com 💵 Calculating the worth of a single Upvote - What is your Upvote worth?