The bible was written through people by God through the Holy Spirit. If God can keep a book on every person that ever lived and write down every thing we have ever done, good or bad, and number every hair on our heads and hold this universe together, I'm sure He can remember and dictate to man the bible. You can have your bad deeds blotted out of that book by accepting His Son Jesus as your Saviour. If not, they will still be there when you stand before God at the Great White Throne judgement to convict you on that day. Any mistakes in the bible are mistakes of the translators. When they found the Dead Sea Scrolls, it was proof that it was much the same as our bible today, correcting little mistakes that may have occurred over the years.