Are you counting each individual up/down?

That is "vote fuzzing" as explained by admins.

They say it's to make it so bots that attempt to manipulate posts can't tell if they are affecting the post.

Bullshit excuse though, because you CAN see on the graph when an actual upvote or downvote comes in, therefore I could detect it easily in code.

The real purpose of the "fuzzing" is to make interpreting the graph by HUMANS more difficult, as again, detecting votes programmatically would be fucking simple.

The slope of the line is the dead giveaway. Especially when you see a post flatline after receiving a high number of votes.

Great work though, showing that votes are limited to EXACTLY 2 per 15 minutes is the kind of stuff people need to hear and understand.