You're getting good suggestions from everyone else here--I, too, like the journaling idea, and asking your T to write out the rules if you are still bothered by this in the future.

I know that your session is so important to you; you wait all week for it. When it goes well and you make progress you feel great. If you are bothered by inconsistencies or things that are said, it can really bring you down; it "hangs" on your mood for a while. Good that you came here to vent. Do try venting in a journal too--don't let this bring you down. You are valuable and don't need this. We're pulling for you!