Ask HN: Someone Mucking Around with Voting System?

I saw this post stamped 1-min ago at the top of a popular thread started 17 hours ago: http://prntscr.com/kw5lj2

It seemed a bit odd being a new comment at the top so wondering if HN sees manipulated posts? It might have just been a timing thing as I saw it drop down quite quickly.

I was returning to this thread from earlier so maybe that influenced something?