OK so the order number from bitmain is clearly in the format:
001YYYYMMDD#####
where ##### is your sequence in line for that day. I am 05060067x and they have shipped up to 050400204 so basically I'm two days behind which could be 500 units or 5,000 units. Depends on how many were sold on those days!
Couldn't we just look in the payment details section of our order? Where the last two lines will show your payment date and time?
Payment Detail
Payment date ： 2018-05-04 01:08:00
That shows you the date / time of order. The order number has a count of units per day. You can derive as much info from their twitter posts, but say for example if you were order 500 on the 4th of May, you should expect yours to be shipped tomorrow, as they are up to 204th unit of 4th of May.