You are one of the lucky ones because you are not guaranteed "point to point tracking from USPS on "Delivery Confirmation".
A Quote from the USPS:
Tracking vs. Confirmation of Delivery
Some USPSŪ products provide Tracking, while others provide only Confirmation of Delivery. It is important to understand which products include these services and the difference between “tracking” and “confirming”. The “Tracking Mail” and “Confirmation of Delivery” FAQs provide additional detail on these topics. This FAQ provides specific information about Confirmation of Delivery. For additional information on Tracking, please go to the
Track & Confirm – Tracking Mail FAQ.
Sorry - this link does not work.
Premium products, such as Express MailŪ, include Tracking. This means that a user checking the Track & Confirm site for a mailpiece sent via Express Mail should see, at a minimum, when the mailpiece was accepted and when it was delivered or a delivery attempt occurred. Additionally, the user will likely see several additional scans as the item moves through the mail stream, such as “processed’ or “arrival at unit”. Products that include tracking provide end-to-end visibility.
Lower-cost products, such as Delivery Confirmation™, only include Confirmation of Delivery. This means that a user checking the Track & Confirm site for a mailpiece sent with Delivery Confirmation should see, at a minimum, when the mailpiece was delivered or when a delivery attempt occurred. USPS may also provide users with additional scan on items that include confirmation of delivery, such as “processed”, “arrival at unit”, or “out for delivery.” However, the price of these lower-cost products does not include end-to-end visibility.