United States Postal Service (USPS) 'tracking' sucks hard

i've recently purchased an ebay item where the seller used the usps priority mail to ship it...and kindly enough sent me the tracking information for it...

so naturally i go to the usps.com site to get tracking information...what a lie.  the tracking information only appears to get updated once the package is delivered...so much for the usps to provide up-to-date tracking...i wonder why it is even offered...