I think it's unfair that Georgiagirl wasn't made aware that her former therapist was basically still managing her case. There has been no transparency that her old T would still be involved in her care and also her consent while maybe not legally required but as a matter of courtesy and in the spirit of openess was not sought.

Also, just to add, the client has a right to confidentiality and anonymity, a supervisor isn't meant to know full details of the therapists case load, usually the therapist just uses a first name or initials or something to distinguish between clients.