T's are human. But, I would be irritated if my T did that. As for meds, go get those as it sounds like you plan to do on Tuesday or Thursday. I forgot which day already.
I would mention the mistake to my T. Atleast she could apologize to me for inconveniencing me. I think the receptionist should have also appologized to you when you showed them the appointment card.
I am glad that you didn't feel a desperate need to talk to him/her. I darn near cried when I found out my T was out sick. I didn't but I came close. GGGRRRR!