This thread is ancient, but I had to reply.
Hi Hope, I just want to say that we shouldn't go looking for "contradictions" and "inconsistencies" in other people's scriptures. A lot of people do this with the Quran and most of it is based on conjecture and mistranslations of certain verses. This is probably also true with the Bible contradictions: most of these alleged mistakes are probably mistranslations. Of course the Bible is considerably messed up, but we should be sure before we go around telling people about "mistakes" in it.
If we want to prove that the current Bible isn't from God, we should just talk about its central ideas and how they don't make sense, like Trinity. That's probably more effective than stuff like this, which is easily debunked and refuted.
No hard feelings, just advice
Mia