Looking to clean up your contacts. You are in the right place.
A contact in your contact book can have multiple emails and/or phones.
Moving a Contact: To move a contact method simply add the contact method you want to move to the new contact and click save. It will be removed from the previous contact. Any analytics attached to this contact method will be adjusted, as well.
Merging a Contact: To merge contacts together simply find one of the correct contact cards, add in the missing contact method and click save. This new contact will have both contact methods.