The bible is the only written words of God that was translated and printed by mankind. Anything that mankind do, well it is not perfect. But at the very least, if you really want, you can get the main things that God is trying to say in the Bible. It is quite clear to many people. So, if you are not clear about it, I suggest you find a good "authentic" Christian that had those signs and wonders that follow them and ask your detailed questions. Look: Do you want man-made philosophies that made sense to you or the true God's words which does not totally make sense to you ? I pick the latter. Hey at least I pick God's words that had REAL power over the universe rather than man-made philospophies that had little power in comparison. At least I have some hope when I am in situations where no man can help me.
You forgot something about who created you: who created your parents, and your grandparents, and great grandparents, and so on. Not just your parents, right ! I know you're just jesting but at some point, there must be a question who created the universe with such intelligent designs ?
The reason God created these "mini extraordinary miracles" is to show people that God is still in charge. I think it's pretty obvious to most. I don't understand why it's hard to grasp that ?
Mistakes by God ? That is a possibility. So what ? God is still God even when He makes mistakes. So, are we going to say, there is no possibility that God makes mistakes. So, if the so-called God makes mistakes then that is not a true God. If we do that, then I think we are being too arrogant to ourselves.
About your concerns on Lucifer, hell, etc: good point but why should you bother yourself too much about it ? I know this that we are given free will so it gives God greater pleasure to love Him out of our own free will. Maybe an analogy: Would you like to marry a wife that is forced to marry you instead of loving you willingly ?
I think I can make it simple: TEST what you believe NOT whether it makes sense to you or not but whether it's TRUE or not. Just like the law of gravity that two objects no matter how heavy will fall at the same rate if dropped from the same location and the same time. It does not seem to make sense at first but the fact says exactly opposite to our sense. The whole pivot of Christianity is not about philosphies but there is real POWER and real miracles in the words of God and proves beyond shadow of doubt that it's true in its message. Lets not concern ourselves with misprints, little discrepancies but to check whether these things are true or not.