Charged Spellcasting VI
Prereqs: Level 17 Sorcerer or Wizard, Storm Manipulation VI, Charged Spellcasting V
Benefit: Grants a 9% chance for electrical and sonic spells to generate a critical hit.

That enhancement is not showing up for my Sorcerer, even when I click "show unavailable." Currently level 20 with 79/80 AP spent, and all prereqs (Storm Manip VII, Charged Spellcasting V).

The other (Element) Spellcasting VI enhancements are also not there when I click "show unavailable" as well.