I said twice, but not back-to-back.

It actually only happened to me once, and my therapist was NOT happy about it. The secretary took care of the scheduling, and she honestly was fantastic, but there was that one time . . . .

Because it was such an unusual thing, and my therapist was quite good, so long as it was just a very occasional mixup, I'd probably let it go.

If the therapist was meh to start with, my patience would not be as strong.