Normally parcel will take 3-5 business days for customs clearance , which mean Express has not received the package and logistics information has not yet been updated to the web site.
Also USPS will only update the new information after package arrives in United States. Please wait for a few business days then track it on the website or contact local post office directly .
The transportation process of Seeed Fusion 's Packages.
Seeed Warehouse→Shipping Agent→China Customs→HK Express Services→Destination→Local post office→Delivery→Your Hand