I haven't written something and not remembered writing it. This would freak me out a bit...maybe you were sleep writing. :-) I have however written something then...when I re-read it later was shocked that I was able to write something like that. My T also made a comment one about how different some of the things I've written are. I think it depends on which ego stage is dominant at the time.
I think I would mention this to your T even if you don't share them.

Could these be something that you wrote while dealing with H and the legal meetings? They kind of really drain ya and may leave you a bit foggy.