When I go through the unmatched email list, if a contact already exists, I am able to assign the email and continue working through the list.
When I have to create a new contact for an unmatched email, the system understandably changes the screen so I can add all the contact information.
SUGGESTION: When assigning a new contact to an unmatched email, open the contact screen in a new tab (possible?) so I don't lose my place going through the unmatched emails.