Everything works properly: -exceptional power (50)- 10 - mighty spellpower (63)-12 - enchant staff spellpower (69)-13 - enchant staff greater spellpower (81) -15 All listed scores are for enchant staff ,if you use mace exceptional power (50) have score 13 (since there is only one better enchant for one hand and you can use off hand in that case).
Actually, yes, I'm the confused one. The staff specific enchant was one i didn't learn and now I have it. And now I'm off to put it on my weapon. Thanks. Guess I should have checked the trainer sooner.