The same reason you are able to 'speak' English yet not able to spell
But seriously if it takes 3-4 weeks from China for you to get your Batch 1 order (internationally) and you're at the end of the queue, yet another is in China and at the start of the Batch 2 queue (i.e. domestic delivery) it would seem obvious, no?
TBI I'm a bit PO by all these whiny 'I want my Avalon' posts; it takes as long as it takes and if you couldn't afford to risk the money then it's a bad investment. Even if the difficulty doubles (from now, as opposed from when you ordered) before most of us get ours delivered it's still a ~1-2 month ROI which is unheard of in most investing circles.
(FTR I'm still waiting on a Batch 3)
Also full disclosure I'm a little drunk