USPS Informed Delivery problem

To change my email address with USPS informed delivery, I couldn't get into my old account due to one security question that I couldn't remember.

So I ended up creating a new account. But then I was gettting emails to both the old and new email address.

Eventually I remembered the security answer, so I have now gone into the old account and updated my email address to the new one.

I should now get two digests per day, both to my new. Once I see that happening, I can cancel either the entire old usps account or I can go into the old usps account and stop all notifications.