Ok got some more information. I just went to the site and checked.  The
certificate I get through the captive portal login page behind the
m0n0wall's lan interface has the correct expiration date.  The ssl cert
I get when I login to the admin page has the different expiration date. 
Where is this extra ssl certificate coming from?  Where can I go to
update it?  

It says it was issued May 10 2005 and this was before I built the
m0n0wall so I assume this came with the installation?