I think it's hard when we see things as all or nothing to remember and hold that there are "middle" grounds and ways of seeing things that we can't yet understand. "I don't not believe you" sounds like one of those to me :-) When I don't understand something my T says, I just think to myself, "okay" and put it aside, figuring it's like that piece of a puzzle that doesn't yet fit anywhere but which I know will, some day :-)

"I don't not believe you" sounds like a tree or grass whose roots are holding soil back from being washed into the river; it's not a wall or something built to help hold the soil back but it's also not something that is working on the other side, with the rain, to erode my soil :-)

I would try to hang loose for the next few months, consolidate what things you have learned since seeing this T and figure out with her how she can help bolster you all's ground with the literal move/school going that's coming up and then move forward from a firmer base you will have made.