Hello Bottles,
Due the order being shipped by Amazon Fulfillment Services, we do not have any knowledge as to how the items were packaged. I would say you should keep an eye out for the other part of your playtest order coming in a second package.
I can confirm that in our system and in the information we sent Amazon, your order does have a Playtest Rulebook and the adventure Doomsday Dawn. All signs indicate on our side that the adventure should be shipped to you. Please let us know in a about a week if this is not the case, as at that time we will have the capacity to begin looking at replacements for lost books. Thank you!