Or is there enough space within the box for the boosters to shift and mix among each other while shipping to/from distributors?
I ask because in the past, some sets of collectibles were packed in a predictable pattern. Open a few packs, and the locations of the packs with chase cards can be identified.
The biggest example of this was Upper Deck's inaugural set of baseball cards in 1989. Generally in that set, a new box was able to produce a Ken Griffey, Jr. rookie card within 5 packs.
Are Legendaries sorted in fixed spots within each sealed box?