Union of Souls (desecrated waystone mod) - Inconsistent key term expanded description

There are inconsistent expanded descriptions for key term "Union of Souls" between two desecrated waystone mods. Mod #2 has increased rarity while Mod #1 does not.

Mod #1: "Natural monster packs in are in a union of souls"
Description: "Union of Souls: Monster Packs in a Union of Souls transfer their soul to other Monsters in their Pack when slain, granting the receiving monsters 20% Toughness, and 5% increased damage."

Mod #2 "Natural rare monsters in area are in a union of souls with the map boss"
Description: "Union of Souls: Monsters in a Union of Souls transfer their soul to other Monsters when slain, granting the receiving Monster 20% Toughness, 5% increased damage and 10% increased Rarity of items dropped."