Yes, I've gotten angry with my T lots of times for small things like that. They really aren't small, though. I suggest discussing it with your T as anger in therapy is important, as is any emotion you feel towards your T. My T is always curious about my anger or anything else I'm feeling. She doesn't get angry back. Good Ts, and I hope yours is, do not get angry with US. They want to help us get to the root of the anger.