After reading the newsletter I am also a bit confused and worried. I preordered quite fast on the first day and I would be really disappointed(pissed) to receive the Pro1 after people who just preordered last week but get the mail faster or something like that.
I also suggest (hope) that the preorder-order will be regarded.
Something like 1) indigogo backers, preorders with a short waiting time before the shipping in order and then the rest in payment order.
Can't wait to receive my Pro1 and have a keyboard again after my E7 broke. :)