No spells in the bar + spell bug ? (Combat)

I think it misses the spell button in the bar on combat mode.

The ai does not seems to understand the spell in our spellbook in combat. I have a summoning spell, but when I cast it in combat, it tells me first to select a target (Wich there's none since it’s a summoning) and the ai create it owns spell, a totally different effect from the description on the spellbook.