I am going to escalate your post for follow-up. The old email address book had a de-duping feature, but the new one does not. So either we get it looked at by a Comcast employee, or you would have to do the manual deletion yourself.
Hi, MH56 - I can submit a request to Advanced Repair Team, they can escalate it to the email engineering team. It's going to take a couple of days. If you fine with waiting - please let me know and I will proceed further.
I would appreciate you submitting the request to the Advanced Repair Team. I was hoping it might magically return to a single entry for each address, but it still shows a double entry.
@MH56 - I created a ticket for Advanced Repair team. They should contact you directly but I still going to follow up here on Thursday to check the progress.