Occam's razor suggests that the simplest explanation is often best.
Since the numbers are moving at all, this suggests that the job to calculate those numbers is running as Terri noted.
So the simplest explanation for this phenomenon is probably that those members that you see either stalled or decreasing in answer points are simply not posting and/or being awarded answer marks for their recent posts.
If i look at recent posts from those members, i don't see any new posts from some of them in the past couple/few weeks. So some of them have been somewhat inactive in the past 30 days. For the others that have still been somewhat active, i see very few posts of theirs that have been marked as an answer over at least the past week (i didn't look further back than that).
Since the job that updates the answer marks runs daily (and looks back at a 30 day window) , any period of inactivity even if brief (just a couple/few days even) is often sufficient for the numbers to start to decline.
So based on what I'm seeing for recent activity, i would actually expect that their numbers would not be rising and would more likely be falling.
Mike Banavige
~~~~~~~~~~~~
Need a site code sample in a different language? Try converting it with:
http://converter.telerik.com/