How does the leaderboard calculate top observers?

I am interested in how iNat calculated the leaderboard for Shope Papilloma Virus, because I think I should NOT be the top identifier for that taxon.

There is currently only one observation of this species on iNaturalist. I was the 3rd identifier on that observation, and my ID wasn’t even leading (it was already RG).

I get that I’m only on the leaderboard at all because there are only 3 IDs; what I don’t understand why I am the top identifier. Shouldn’t the 2 IDs before mine, which were leading & RG, be somehow weighted to be higher than mine on the leaderboard?

Also, I noticed the leaderboard seems to completely exclude the observer’s ID (which was both the 1st ID and the leading ID):

Is that by design or a bug?

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