Yeah I'll agree with everyone else that a different therapist is in order. Your daughter definitely needs someone who can be really consistent. Is she seeing a psychiatrist also? She may need medication.

I'd suggest having her see a therapist once a week instead of every other week. I think that's the most helpful though it's definitely expensive. There's less time to forget everything between sessions. A good therapist could probably help your daughter a lot. Have you checked around for referrals from people you know? It's awfully hard to pick a therapist without. Someone who specialize in working with teens. I know there are some good threads somewhere on this site about picking therapists...

I hope things improve for you and your family.
Sidony