Stock is now allocated to your order
This means that Farnell know where you are in the order queue and can therefore predict, based on the incoming delivery schedule, when you are likely to get your Pi.
But if I enter the Farnell's site, it is BACKORDERED. So, did I get one, or did I entered the preorder?
This is because you have started a new order - which is totally unrelated to your existing order.
Btw, I emailed them, with no luck in two days.
They've probably been busy!
I'm a Farnell account customer so I know these things.