So if I made more than 28 posts in a two week period I'll ever more messages than Activity?
You can get at most 14 activity in 2 weeks, so if you made more than
14 posts in a two week period, your post count will be larger than your activity.
Is this a recent development? Used to be much simpler iirc.
It hasn't been changed for at least 4 months.
But I have no idea how activity is calculated before I joined bitcointalk lol.