My T mirrors some times in some ways. Mirroring makes us feel safe and understood. My T may lead a little with his posture to see if I follow and then he knows I am feeling safe and open enough for him to suggest something. He may mismatch me to break rapport because it is the end of the session... there are a million and two ways of using mirroring in the therapy process. Now that I feel safe T1 mirrors a lot less. T2 tries, bless her heart... but it mismatches... she means well. It is an art and she is still learning.