I have posted on this subject before, in a more general way perhaps. There are a number of horrible inconsistancies and conflicting passages in the bible. Many are illustrated here...
http://www.evilbible.com/
I encourage Christians and agnostics to study that site and perhaps participate in the forums there. Be fore warned however, it will totally change your perspective on the bible AND in the forums, illogical arguements are not tolerated (arguements containing fallacy). It is an intense community set out to deconstruct the most influencial book in history.