There are a few reasons: http://www.righto.com/2013/11/how-hacker-news-ranking-really-works.html http://www.righto.com/2013/11/how-hacker-news-ranking-really..

There are a few reasons: http://www.righto.com/2013/11/how-hacker-news-ranking-really-works.html http://www.righto.com/2013/11/how-hacker-news-ranking-really... I think it's the relation between upvotes/comments and also maybe many were upvoting from the submission page (which triggers vote ring detection or something, read about that somewhere)