Update: It gets worse. I just talked to a bandit highway man who tried to rob me 200 golds. Instead, I chose the intimidate options. The bandit highway an said "hey that seems fair, now go along before the others notice" and 200 gold was removed from my inventory.
@bobjim123, in the college, if I say I want to study healing they give me a healing spell to cast. If I say destruction, they give me firebolt. If I say illusion, it's magelight. It's not randon. And this same bug occured to me now, but with a bandit highwayman...
I have never been asked for a spell from the school of magic I tell her, it's always a random one for me. I've been there (for the first time) on at least 5-6 different characters. I tell her conjuration, she asks destruction, it's never been from the same school. Also magelight is an alteration spell.
I think that's just a bug with random bandits and thieves, it's happened to me before. I just reloaded then killed them straight away, I fight them every time through speech now.