What does "Origin Post Preparing Shipment" mean?

It's been stuck in that status on USPS tracking for THREE days now. The tracking on Hong Kong post says my items departed Hong Kong on the 19th. USPS still says "Origin Post preparing shipment". I called customs at JFK and they said they have it, but USPS says it hasnt left HK, I'm really confused and I need an answer. Does customs have it? And if so, why is it taking so long to be released?