Bug of Miscounting due to Number of Kills

The kills should be 19 but the game counted it to 20.


I got another photo here.I got 5 kills but it says 4.Should be enough proof.

Please fix it so the game could be more fair. Thank you for your attentions.
Its not miscounted, it's like someone killed one person and left the match and other one joined
Frank
Its not miscounted, it's like someone killed one person and left the match and other one joined
oh