deleting e-mail addresses in Mail program

I have searched for an answer to this problem with zero results. My problem in my address book for the Mail program there are duplicate addresses which are no longer relevant to my contacts home. Especially since a number of were forced onto Rogers.com from Shaw .ca

Highlighting the address and using the delete button does not work and trying to physically trying to move them out of the address book fails too.

I would appreciate any and all help

Thanks:)

via ehMac.ca http://ift.tt/1x1YW02