Member counts gets out of sync

I'm finding that the statistics on the Membership dashboard get out of sync. Are the values displayed being derived from an actual query that reports on the current state of the various subscriptions/levels? Or is it some kind of counter that gets incremented/decremented?

Over time as users are added/deleted and subscriptions added/dropped that the counts seem to drift from the actual numbers.

I'd like to request a feature that would allow an admin to force the stats to be regenerated so that they are accurate.

I'm running Membership 3.1.2, Wordpress 3.4.1, and Buddypress 1.6.1