I don't understand how to best manage my Address Book, or how they are set up. Duplicate entries appear in separate subfolders of the main folder, "All Address Books." Why are there so many subfolders? I have three: "Personal Address Book," "contacts," and "Collected Addresses." If I modify a contact's info in one list, does it update the same contact that is stored in a different list (if not, why not?)? I want to have an efficient, tidy set of contacts that is easy to use and locate individuals in, with complete info in the contact regardless of which "Book" it is in. I am surprised there is not tutorial on this aspect of the product yet.