I think I understand, Patagonia. Well, I relate. I have parts too.....Problem was, my parts would frustrate my Ts and confuse them. Like I had a similar issue where I couldn't make a decision about my situation because I had so many parts fighting with me about it internally...and I would change week to week.
It's hard when we have our different parts battling internally all week long and we go to T to get respite and they end up siding with certain parts that are more acceptable to them. I get that so much.....
I'd recommend telling your T what you said here if you haven't already. If you think you could...I told mine I feel alone all the time already and I didn't need to pay someone to make me feel even more alone. That's how I felt. He apologized sincerely. We talked about it many times over too. He was patient. He was compassionate about it. He maybe was pulling hair out when I left lol I dunno.
But my problems + my payment = treatment that works for me and my needs. T can help me work through it or tell me if he is not able to help on his end and refer me on. That's how I see it

and ruptures can be good too - give us a chance to practice assertiveness and to grow.
Do you feel like your T understands DDNOS?