You are missing that it's not Ubiquiti causing the problem here. We don't know why different places are listing these products, what we do know is that according to Ubiquiti, they are early release and not eligible for resale.
Do you really think B&H would be selling product that's not officially available?
you didn't buy it from B&H, you got it from NewEgg, So I really wonder, is B&H (no clue who they even are - never heard of them before) just has a page up for pre-sales. Don't really know.
Everything on Ubiquiti's site points that the product is still in beta.
I had a quick look at some products here, and only Aircube seems listed on products page. No XG units, no application server, no PRO camera, no application server. If Aircube is still beta, it should be clearly marked as such on main product page, not in forums that are inaccessible without applying for early access.