I'm sorry it didn't go well this time... Just a thought--is it possible you're looking at him differently because of the cane? (I totally get that concern though!) When you describe him, you mention the "wounded" part. So, I don't know, maybe you're ascribing some mental frailty to go with the physical part? As for him saying he's not perfect, I think it depends on how he said it. Did he seem defensive or apologetic? It's possible that since you connected so well with Sparky that you have unmeetable (I'm sure there's a real word for that, but it's been a long day!) expectations for Kashi? Especially if you've only seen him a couple times?

I've also found it can help to tell a T that you want/need a different approach. Like my marriage counselor in the beginning was letting H and I lead and wasn't really pushing us at all. I told my T about this, how I didn't think it was helping, and with my permission, she told MC that he needed to push us more. So he did, and it helped. It may not have been his natural style, but he was able to do it. Kashi might be able to adapt that way, too. So I'd give it more time.

Also, I'd share your concerns about his health. Because he said it was a neurological thing, I could see how you'd wonder if would affect his brain. But if it's, say, rheumatoid arthritis, then it would just be a physical thing (my mom's close friend has that). Though my mind would jump to all kinds of things, too (like in the case of my MC's wife, who has a chronic health condition that I think has made her wheelchair-bound--we've discussed it a bit, though he won't give me a straight answer about what's going on with her. Which I think would help me. Because I just assume the worst otherwise.).