Why the Elementalist from F&I doesn't have Spell Mastery as an Everyman skill, while all other pure Essence spell users have it? Spell Mastery is listed as an Everyman skill for the Magician, the Illusionist, the Mana Molder, and even for some Hybrid, like the Mystic, Sorcerer and the Enchanter. The only other pure Essence spell user that doesn't have SM as Everyman is the Alchemist (but he gets Magic Ritual and a lot of Occupational skills).
Is this for balance reason or it's an errata?