You hit the nail on the head, Hellbender. While I do believe in a literal Adam and Eve, I also believe, as you do, that there is a deeper meaning behind the story. C.S. Lewis called this the mythic element. You understand literature and you know that calling something a myth does not imply that it did not happen. It simply means that there is more meaning to the story than just the facts. Many of the fundamentalists insist on a wooden, hyper-literal interpretation of the Bible that ignores the deeper meaning behind a mere recitation of facts.
Jesus spoke in parables and, while the parables contains deep truth, some of them may not have literally happened. That doesn't make the parables any less true.
For what it's worth, I do not doubt that Jesus and other Biblical performed real miracles. However, most of the miracle stories involve more than just a recounting of history. The story of the centurion and the woman who touched Jesus' cloak come to mind.
I'm certainly glad that you're on this thread.
Like you, I believe that Jesus and the disciples did perform actual miracles. I think the Bible shows that God does not perform or authorize miracles on a routine basis (otherwise, they wouldn't be miraculous), nor does He bail out every believer in trouble. Miracles are mainly used to advance the Gospel and the church at critical moments, when it might otherwise have been extinguished.
I think whenever one reads the Bible, esp. the Old Testament, one should always think: What is the moral of this story? What is the real point?