Don't try to use christian literalism in buddhism.
Buddhism use a lot of poetry and fantastic telling to explain mental processes. Buddhism copes with subjective experimentation of the world, so you cannot expect to set an orthodox interpretation of the Dharma.
BTW there's no concept of reincarnation in buddhism, neither soul or God.
The oldest buddhist school of thought (Theravada) take rebirths as happening in just one and single lifetime. As you-child it's not the same person as you-old, and there's just an illusory sense of continuity between several "you's" in your lifetime, every you is (in any sense) a different person. Because you are not a single entity (soul) but a dynamic process.
That's buddhism in a nutshell. You can think about reincarnation and junk DNA but there's nothing about that related to buddhism. Try to use something else to support your "theory".