Well, obviously, you're thinking way too much. In order to have faith, you must abandon logic, reason, truth, and intellectual honesty. If you do not, you get into trouble. Once you know a thing, you can't unknow it. Like how the human genome project shows we originated in Africa, not the Middle East.
If one is to believe that the Adam and Eve story is literal truth, then what follows, logically, is that the entire human race is a product of incestuous relationships. Logic raises far more questions than the Bible or Christians have made up answers for.