It depends.....how did your last session end? If it was awkward or raw then I can understand that your T thinks maybe you were going to avoid them, so wanted to clarify the invite still stands.
Or it could be that they simply wanted to lot you know they are back and just didn't think how the second part could be interpreted. (Eg maybe they just put "Your appointment for next week is still standing" but thought that sounded like they were TELLING you to come, so added the last bit to make it more obviously about your choice).

I'd say just ask them and talk about how it came across to you, may open up something interesting.