Seeing different last update times on different machines

[Λύχνις Δαν]

I made a post to the thread

 about 45  minutes or so ago. On my Mac where I made the post the it was showing my post as the last on that topic (until a few minutes ago) and showing it at about 46mins ago. Going to my other laptop I see it is showing that as 10 min ago. I don't understand why there would be a difference.

 

Thx

D