What has always irked me about old earth creationists is their belief that God didn't mean exactly what He said. That God, in fact, misled us via the creation story in Genesis.
God revealed to us that He created the world and everything in it in six literal days. That He created a man and a woman immediately, and not through a process involving millions of years. He told us plainly that He flooded the entire world, killing everything but Noah, his family, the animals in the Ark, and the water dwelling creatures.
These stories were not metaphors, themes, or fables.
The hard truth is, old earth creationists trust the opinions of man over the word of God. They try to cram evolution and millions of years into the Bible instead of letting the Bible speak for itself.