Why is a highly ranked, recent story being buried?

The Mozilla CEO story[1] is on page two of the feed on HN with 600+ points, 700+ comments and is 3 hours old. What part of the algorithm allows it to be put below items that are simultaneously older and ranked lower, such as [2]?

[1] https://news.ycombinator.com/item?id=7525198 [2] https://news.ycombinator.com/item?id=7523229