It could be 2 things- Your game might be buggy, or, you didn't finish certain quests in Mooshu. There are certain quests there that must be completed by Life Wizards in order to advance. I ran into a similar problems, once, long ago. Visiting Mossback, in Mooshu might help. Looking for every single quest in Mooshu is likely your answer. Life wizards have very specific tasks they have to fill in order to get their spells. Certain level 36 tasks. Certain level 10, certain level 18's...one has to complete them in order to get ALL of their spells.
