Very true they are signs of trance.
BUT,if you did not wake when the file suggested too then you have fallen asleep.
It would be very rare for you to go that deep into trance after a few days experience with hypnosis,and even then you would still wake when suggested too.
You said
"Plus, whenever I believe i'm in a 'trance' im mostly just sitting there completely unmoving, but still (conciously?) hearing the words, so it sometimes occurs to me I might not be in a trance at all, only subliminally mimicking one".
This is a perfect example of a light to medium trance. Once you experience more and more hypnosis you start to go deeper and it's not until you go into the deeper state do you start to have only some or no recolection of what is going on.
Try one of the easier files ( eg trigfreeze ) and test from there and see what happens?