I think maybe you need to do a little more research as many of your points simply don't correspond with the scriptures. The order within God's Word is Adam and Eve, Noah's Flood, Tower of Babel, the law. Mankind according to God's Word has seven great ages. I suggest you fully discover those. Tower of Babel for example, this is the moment where God split up the nations and those people formed their own nations including the people who would become Egypt. You seem to mixing up secular world history and applying it to God's Word, we reference God's Word then place that on history to give us the true nature of events in our past which you'll find, correspond beautifully.
Your most certainly over thinking a very clear chain of events contained within God's Word, maybe you need to simplify your thinking, remember that young and in-experienced Christians are reading this, God's Word is the only authority, man's wisdom, mind and logic do not compare to his great Word. His Word is there to mold our minds in truth, it's not there as one of many references, it is 100% and secular history, geological, archaeological finds and science itself, cannot discredit God's Word. Deep study of God's Word in the original texts by the guiding hands of the spirit conclude God's Word to be perfect, so when God claims the whole world was covered in water, then it was covered in water...