Single post in Update box information

I clicked on and looked at the items that are listed on the Box contents and probabilities. it shows a 2% for summons items and as the informations says. A Summon Item is chosen randomly with equal chance. If that item is not unlocked, prize is replaced with 75—150 Gold Poké. But from what i know even with a legendary seal the summon will be random whether you may have gotten it before or not.