The gathering of texts that we call the Bible today was approved by a papal committee around 380 AD. After much to and fro about how many and which scrolls of various sects and regional minorities to abridge or throw out completely. A grand exercise in politics, that.
I do find the notion of original sin (and less so, simple disdain for nudity) rather odd, to say the least.
I don't believe those that have described the web blurb as hopelessly flawed, have offered a positive explanation yet for where anyone apart from the descendants of the garden originated. The only obvious defense I see there might be a claim that everyone must have descended from Eden somehow, and parts of the story have been omitted to suit God's (to our logic, at least) quite capricious will. Much as the dinosaurs and many years of evolution seem to have been distorted beyond modernity's ability to account for...
Rather little seems to be said about Adam and Eve after they supposedly attain divine wisdom of good and evil from that tree -- if in fact, they do? (Well, they're alright at bearing children and making bloody sacrifices -- I think we can all agree on that.) If they did attain it and if in fact the Old Testament were supposed to provide a ready moral guide, it seems odd that the authors didn't spend more time on every detail of their lives. I would expect to see huge volumes. If they did not attain it, then someone (they, deity, serpent, and/or all of the above) has been dishonest or perhaps deceived. [rather sarcastic but more and more oddity] Either way, I blame the Great Cosmic Nil that preceded God such that he was able to be first before filling it, etc. Now that's an enigma not to be trifled with. [/ahem]