I have the same buzz score of 62 for 4 days, but my ranking goes up and down.

Four days ago, I was ranked 29 in Leaderboard.

Then it dropped to 50, and yesterday I was ranked 41.

Today my rank is 30.

I wonder what is going on, since my buzz score is the same, that means others must have suffered a deep drop or a great increment in their buzz score.

Fortunately the earning is very consistent.