That's great that it was a productive session and he was so open with you about what he was feeling. Definitely seems like it would explain the tension between you. He's probably trying to be extra careful, too, because of what happened with T1.

Funny that my T said stuff that suggested she had some maternal countertransference for me last week--talking about blurred boundaries and her feelings getting involved, concerned she was too close to me to view my situation objectively. This was in response to me saying she had seemed really distant from me in the session before she went on vacation. She said it was because she was trying to take a step back and probably went too far in that direction. (Which led to her suggesting hospitalization, when she knew I would object to that--it felt like she was treating me like a random client, not like someone she'd been working with for 4 years.) I had sensed she was getting closer, but was afraid to bring it up. I was really surprised she shared all that with me, because she usually doesn't talk about her feelings or reactions to things with me. (That's more of an MC thing. Though he's never mentioned countertransference toward me. But I'm pretty sure there's some of the paternal type of that going on with him, and that's why he's gotten closer and then pulled back a couple times.)

Part of your issue with T1 was that he was getting too close but wouldn't admit to that, right? It sounds like your current T is much more self-aware and willing to admit his faults. Which is definitely a good thing! Hopefully talking about all of this will just make your relationship with him stronger.