I tend to agree that the word "yom" is meant to be read in the 24-hour sense, but this does not at all mean it was meant to be read as literally six 24-hour periods. The analogy I use most often for this is the poet who uses the symbol of a tree to represent a family. Now, he will never in the poem state that he wants us to view the tree as a family, but he still wants us to get that. But, he also wants us to read the word "tree" in his poem as a literal "leaf and branch" tree, not some other form of tree such as a "tree" computer file system. He wants us to hold to the proper definition of "tree" but he also wants us to realize that he is not actually writing a poem about a tree, but about a family.
If God is telling us about His Creative process and using the figurative literary motif of six days, then he wants us to hold to the six 24-hour period definition, but realize he is not using this phrase literally, but as a literary device.
And, you are right, God is not the author of confusion, but He has inspired a lot of writing that has resulted in a LOT of confusion and angst and disagreement and strife and even killing fellow Christians. Nothing new there. Even Peter said that much of Paul's writing was difficult to understand (to say the least!). I urge you to read my recent post on Augustine's approach to this issue. Also, consider that the Westminster Confession of Faith concedes that much of Scripture is unclear, but that what is needed for salvation is available to the simplest of minds.