My experience with ZZF is that they are taking extreme artistic freedom with their availability statements.
In stock = Might be in stock or not (it's way too hard to change it to "backordered"), but go ahead and order it and we'll charge your credit card
Their status page is equally "helpful":
Processed = we charged your credit card and now we'll look if we actually have it in stock
Packed = not really, we are still waiting for it but at least it looks like something is happening
In conclusion: until you get your shipping confirmation, don't hold your breath.
Just my experience,