Unfortunately there was a misunderstanding in the initial posting of how the Legendary guarantee works for Soldier (silver) Packs. This has been causing some confusion for players who haven't seen a Legendary by this point.
This guarantee does NOT work just like the Champion Pack. There is not a hard limit where you will receive a Legendary. Rather, the odds are set so that it is highly probable you will receive a legendary by that point.
Nothing has actually been changed, this just clarifies how it works. Any numbers that you've seen shouldn't show any variance from what you saw before.
Apologies for the confusion.