I have absolutely no understanding of therapy issues, but if your therapist was really making fun of you, it probably is not part of her therapeutic background. It might be that she didn't mean to be sarcastic but to give feedback in some way.

As for CBT - why does it actually matter what it's called? When you have cognitive distortions, obviously you need to get rid of them and CBT could be helpful, but if it's helpful or if it's not, doesn't change what it is called. By the way, why don't you just ask your T what theories she subscribes to?