When an odd-numbered mystic theurge level above 10th is gained she gains new spells per day (and spells known, if applicable), as if she had gained a level in an arcane spellcasting class she belonged to previously, up to the maximum spells per day and spells known by that class. Her caster level in that class also increases by +1. When an even-numbered mystic theurge level above 10th is gained she gains new spells per day (and spells known, if applicable), as if she had gained a level in a divine spellcasting class she belonged to previously, up to the maximum spells per day and spells known by that class. Her caster level in that class also increases by +1.