List archives not entirely up to date

This page http://lists.macosforge.org/pipermail/macports-users/2007-October/ thread.html shows messages up thru October 8, which is correct. But this page: http://lists.macosforge.org/pipermail/macports-users/2007-October/ only shows messages up thru October 2. What's up with this? Same goes for http://lists.macosforge.org/pipermail/macports-dev/2007-October/ thread.html (which is up to date) and http://lists.macosforge.org/pipermail/macports-dev/2007-October/ (which isn't). Why do we have 2 URLs per mailing list which are supposed to list the same thing, but one of which is out of date? Perhaps one should just be a redirect to the other. Or perhaps there's a pipermail configuration that's amiss.