It might be helpful to do some research on traditional Folklore. Probably since the beginning of time, stories (true or not) were primarily passed down by word of mouth, and as they were passed down, they changed.
At some point in time, the "biblical" stories (true or not) were finally written down. And then copied. And then copied again.
If you think about how many times the stories were orally retold and subsequently copied, there is no way to know what the true, original story is. Every reteller or rewriter could have taken liberties to change what they want to fit their won interpretations and beliefs.
Some people complain about the many different translations that are out on the market today, insisting so many are "wrong" (and indeed, many do not adhere to the oldest available copies known to be in existence), but fail to realize that these oldest copies of Biblical text that are in existence are probably equally wrong. We just don't know it because it seems to be accepted as "fact" that these ancient texts are the original texts, and that is far from the truth.