I Am An Atheist

Why does it fall to me to explain anything? In your OP, you said you were an atheist and it seemed to be because of contradictions in the Bible. So why don't you tell us some of those more compelling contradictions that convinced you? And you'll also need to confirm why you are certain that the passages which form a contradiction aren't poetry and how your understanding of ancient Hebrew and Greek preclude any other interpretation. Since you question everything, I think you'll agree that's a minimum amount of thoroughness. And since we're talking about the contradictions that are foundational to your atheism, these should be the original contradictions you learned about, not those you just figured out after having been asked for examples 3x.
After all that, it may be necessary that you at least give an opinion on why the writers were so amazingly incompetent as to come up some very glaring mistakes--not getting their stories straight w/each other, or even allow contradictions in adjacent sentences--and why the very educated scribes who made copies didn't redact them.