I'm pretty sure these are duplicates.
This is the current Hydreigonrocks created 3 weeks ago.
This is his old Account, made 1 month ago, with -180 points.
His newer account has 506 points.
I'm not directly accusing him of voting himself up, but i'm 90% sure, he made a new account, with a small enough name change for most to just think he came out of the negative points, but he has had a few moments of random upvotes.