Found also some unexpected confirmation from "The Edgar Cayce Primer" book:

...the soul is judged by choices...

The readings say that there is soul entrapment throughout the universe... [but] no matter how far astray we may go, there still remains within us the pattern of and the link to perfection...

Remember, the soul not only bears [Akashic] records of the individual, but it is also an energy pattern. The emanations from the records of the soul quickly permeate every cell of the physical body and it thus becomes truly and uniquely an appropriate expression of that soul...
However, the book denies the popular thesis that we have simultanous incarnations - "one soul for every body, and one body for every soul incarnate in the earth."