First off, I'm loving WHMCS. I do have a suggestion though. When someone would like to change the primary contact but wants to keep the old one as billing or just as a secondary contact, it seems like we have to remove all details from the contact then re-enter both sets of information (the new and then re-add the old as an additional contact.)

Would be nice if we could just enter contact information, then from a drop down select what type of contact they are... 'primary', 'billing', technical', etc..