[+++Poguru+++]

On #4, it seems to me that there is the possiblility of Astral Projection and/or ESP to show why material that seems channeled can be 'partly true'- A characteristic of the human brain/mind called 'confabulation'- the subconscious doesn't have the capacity to say 'I don't know', because discrimination is a province of the conscious mind- so if you as a medium receive information about something, and is asked where it came from, the subconscious mind will go to it's resources (memory) and pluck a cause for it that matches it's beliefs. The subconscious doesn't know the difference between a memory (past) and a perception (present) so will choose what fits best.
This isn't a lie, only the conscious mind can lie. This is the subconscious providing what it's asked for. A cause.
I'm just saying it doesn't have to be a demon (if we really know what a demon is) it can be the subconscious confab.