Thanks ... Couple of things:
-- what is the Main contact list? Not sure I follow. You're probably suggesting that I pick an appropriate gropu?
-- and typically this happens when importing information from Mail. Click on signature information or the address token in the header and when Address Book populates either a new or existing contact with the entries, the new fields will all be "other."
Essentially I end up having to edit every addition to Address Book. Messy