I think the problem is indeed the interpretation. For this reason, there will never be an agreement between believers and skeptics about how many contradictions the bible contains.
The bible was written by people of different knowledge and education. Which makes it perfectly understandable that many passages contradict other passages in hundreds of different ways. This link
http://skepticsannotatedbible.com/contra/by_name.htmllists 418 contradictions, but the bible also contains an even greater amount of plainly wrong statements, for instance a wrong value of the number Pi.
However, here comes interpretation: with more or less effort of faith, you can interpret away any contradiction in any possible book. Especially when it's translated from a dead language and you can choose to understand the original words in any way that fits your faith. You can believe in the nonexistence of bible contradictions in exactly the same way as you can believe in the bible miracles.
