Maybe a huge influx of orders sold them out, maybe they just didn't have that many in stock because they were waiting on new units with the 2.0 upgrades. It's all speculation until the numbers come out.
Then your questioning the wording? Guess that makes sense not everyone interrupts things the same. Some good questions too, I think I saw a number for MYDX maybe you could call and ask then post back here. I am sure others would like to know your findings also. That would be great!