Ask HN: Is the Ask HN algorithm broken?

I don't understand the ranking algorithm looking in the ask section on HN

For example I saw a post with time 6 hours ago with 7 upvotes ranks higher than a post with 22 upvotes 1 hour ago?

What is the logic of the ranking?

I've noticed this a lot recently, as in the last year or so

Also why is a post from 2 weeks ago still on the front page of ask?

https://news.ycombinator.com/item?id=44448461

Anyone understand this algo?