Just to clarify and stop potential confusion. What you call the waitlist number (which determines shipping order) is in fact the IndieGoGo contribution number, sometimes called the backer number. This number has never been a secret - in fact, it’s so much NOT a secret that it’s clearly written out in the subject line of the confirmation mail we have all received from IGG. The projectors are shipped roughly in order according to this number, with adjustments to accommodate for reasonably sized and prized shipments to different regions.
The number you call the “real backerkit number” is in fact not used for anything else than looking up your own shipment in the lists posted by PhilipsNono. That number doesn’t reflect shipping order in any way.
Please see this thread for further information and instructions on how to find the different numbers.