Hi Sunny,
I'm jealous that you have spent time with T out of the usual context but I wonder if it will make it harder or easier (or no effect) when you two sit across from each other in the therapy room again. I bet it will make your therapy better!
It must be difficult having T serve more than one role! And I don't think you said anything wrong about his credential--you just restated what the insurance company said.
Best of luck with all this stuff--you are doing an amazing job.