Hi queenie. Coming here for support is what it's all about. You do contribute when you post!

I have experienced this also.

In my recalling the session afterwards, I 'saw' her in a different place in the room and she always sits in the same place. That session she was writing, something she only does if I am telling her about a dream although this was about a trauma. Anyway, in my recollecting, she is writing with the opposite hand than she actually uses to write.

In another recalling of the session, she kept appearing in my mind as a much much younger woman.

I also will 'hear' her in my recollections as sounding different--angry, irritated, mocking, etc.

I guess it's good that we know that there is a discrepancy, that it's something our mind is doing. It's interesting to explore in therapy, so I encourage you to share what you wrote with here with your therapist and the two of you can see where that takes you.