the uploader edited the log - changed the names of all the players, removed your damage entries from the log file

Uploaded by Jaguar-----LF scrims on May 20, 2018 6:01 AM
who tf is jaguar

Cole the Engy 21 engineer.tf (Score:20) defeats twitch.tv/b4nny (Score:11) on Viaduct Middle.
You gained 11 points.
Cole the Engy 21 engineer.tf : Haha b4nny I beat you as engineer while your playing soldier in front of 5 thousand viewers!
*SPEC* twitch.tv/b4nny : Nooooo!!!! I got beat by a engineer main!!!
*SPEC* ♔ peremptory proceedings: Holy shit b4nny you got fucking destroyed bro. That Cole Conagher gentlemen has only 3 thousand hours on his main account (he switched because he got account compromised/hacked) and you have over 15k+ wowowoww,
twitch.tv/b4nny left the game (Disconnect by user.)
Cole the Engy 21 engineer.tf : Yes that is right b4nny, because you see, engineer deserved a place in the 6 v 6 meta, because it is a superior class to soldier. But pretencious 6v6 elitists like you are biased against engy becasuse your jealous of his high skill ceiling P.S. Coheed and Cambria blows.
*SPEC* twitch.tv/b4nny : FUUUUUUUUUUUUUUU-
twitch.tv/b4nny left the game (Disconnect by user.) <---- LOOOOOOOOOL
*SPEC* ♔ peremptory proceedings : Can I add you Cole?
Cole the Engy 21 engineer.tf : Maybe

How did he leave twice

https://steamcommunity.com/id/jaguarfiend/
There

ya i can almost guarantee that jaguar didn't do that to that log

L 05/15/2018 - 14:26:50: "twitch.tv/b4nny<4><;[U:1:10403381]><Spectator>" disconnected (reason "Double ragequit.")

Someone with an alt fishing for attention. Just ignore them and move on

Uploading a fake log isn't very hard. It's a simple text file so you can just open it in notepad, ctrl+f and remove/change whatever you want. In this case the guy did that to remove all your entries in the log of damage/kills and changed the names of the players.
With some basic server knowledge you can then reupload it to logs.tf as a new log

and if he did, it was probably for a joke rather than to tarnish your reputation

edit:
12:46 PM - tsar: also, was that you that edited the catbowar log?
12:46 PM - Jaguar: ?
12:46 PM - Jaguar: I edited nothing
12:46 PM - tsar: http://www.teamfortress.tv/47853/changing-logs
12:47 PM - Jaguar: i have nothign to do with this lol wtf
12:47 PM - tsar: lmao
12:47 PM - Jaguar: it's not hard to edit i imagine
12:47 PM - Jaguar: it's a file that can be opened in a text editor i'm sure
12:47 PM - Jaguar: and then you can just swap some numbers
12:47 PM - tsar: yeah
12:47 PM - Jaguar: might be more involved than that though
12:47 PM - Jaguar: because it's not 1 total number
12:47 PM - tsar: its just weird that your name is attatched for whatever reason
12:47 PM - Jaguar: the logs site adds up thousands of these numberes
12:48 PM - Jaguar: fucking conspiracy
12:48 PM - tsar: someone's out to get you

Its pretty easy to edit existing logs and then upload them. I assume someone has access to jaguar's api key so he should definitely change it. (http://logs.tf/uploader)

Yeah I'm actually a little worried about why it has my name on top. I have nothing to do with this.

exposed?

http://logs.tf/uploader Click "Generate new API key"

Now Cole the Engy 21 engineer.tf is going to write up a chat conversation about beating JaguarFiend 20-1 in MGE! We should all fear the notorious engi main.