When you see your reputation history there is two words for downvotes, "downvote" and "downvoted", representing when your post was downvoted and when you make a downvote.
It feels like it should be the wrong way:
I think it should be "downvoted" when you were downvoted and "downvote" for the downvotes you made. Or maybe changed all together to different words.
Maybe is this a bug? Maybe my understanding of English is not good enough?