Can someone help me import perfect csv spreadsheet into address book?

I have spent almost two years perfecting my excel spreadsheet with columns exactly matching the fields in address book, and saved as a CSV. When I try to import up comes a two-column list, fine up until column 8, where it suddenly starts saying "do not import" and "ignore" and "in use". I fiddle for hours but don't know what it means. Experiments lead to fields in the wrong places. I have read a whole correspondence about this, but solutions too complex for me.