huntgroups being processed no matter what

So far freeradius has been great and very versitile but one part has got me confused. 1. understanding is that the huntgroup file is used only if the huntgroupo attribute ia listed in the user file that the user matches. From my testing it appears that the huntgroup file gets processed no matter what and if it can't match anything it rejects the user. 2. I have also noticed that if I list nas-ip-address in more then one hunt group it will only work on the first one. the second one will never match. I have searched the mailing list and someone has touched on this problem in the past but there was not resolve. Any help would be greatly appreciated. Mark Jones