Agreed. If you look at the time stamps they seem to be distributed around the clocks based on the hours and minutes. Relying on the seconds seems risky unless it’s a way to prove legitimacy. My guess is hours and minutes and it tracks around the clock.
Also deltas. You have sequences in the gaps, like posts that have patterns of 2 minute gaps. 3 minute gaps, 5 mins, etc. You can connect posts from across the map this way.