I was recently given a burnt copy of songs off the "WhiteLp" and some of them had different musical accompanyment! Version of "Blackbird" and "Piggys" songs were sung and played differently along with others! I think that they were demos that were later tweeked? Anyways they sound a lot clearer with no layering!

Perhaps you've listened to a copy of the Esher demo tapes. The Beatles played a lot of the White Album-songs in an acoustic version at George's house and recorded it in a simple way.

Could be. I've heard that before and it sounds really great.