Actually it doesn't...
if you look at your profile
here at phpbb.com and then mine
here at phpbb.com, you'll notice that your most active topic and forum do not display. I think I may have found a correlation.
Here on this forum, you have over 10k posts. I have a miniscule amount comparatively. On my forum, where I also experience this phenomenon, I have over 10k posts but none of my other users come close.
Since it happens here at the phpbb.com site, maybe it’s just a limitation of the statistics code that prevents it from accurately picking a “most active topic or forum” when there are so many posts to contend with.
You think? If you don’t agree and still think it’s a problem that I incurred with my forum modding, then I’ll fill out the paperwork. =)