From what I can tell, I think they are only planning on selling up once the Kickstarter has been shipped.
If they sell up before that point, they will only do so if the Kickstarter is shipped.
Prodos is questionable at the best of times, but not quite that crass.
Yeah, the Pledge Manager is a total mess. Although I am not the driver of that, I can only apologise for the stupid need to reopen and close it all the time.
I can confirm the 500 copies thing is not untrue. The aim is to complete UK and USA shipments using that and there should be some left over for elsewhere. The latter bit may not be 100% as it's not my decision or role, but I at least know that 500 KS copies are coming into the warehouse in Poland.