I recently changed hosts and my IP changed, as well as my port number. My IP eventually updated through my DNS entry I have set for my address, but my port never did. The query port had an error and then allowed me to update it, and I thought it would have updated it then, but it hasn't yet, so my port number looks wrong on the site. It's currently set for 28216 and should be 28015. Please advise.

If choosing to use the dns option the server join port may not be changed;
http://www.gametracker.com/forums/forum.php?site=1&thread=108256

There is in any case no option to change the join port of a server, except by adding it as a new server.