Let me start by saying thanks for the comments and to answer some of your questions:
"You know the trick of stitching over the incorrect twist?"
I have never tried this method but it looks very interesting. I guess if I was ever put into a situation where that was my only solution, then perhaps I would try.
"Ouch. I'd be worried about laddering down that particular cable. And about laddering down that close to the cast-on. What are you going to do?"
Well, I figured the best option was to do just that ... and ladder I did:
Scary? I know. It's not an easy task taking this method on, but it is by no means impossible to do. Here is how I worked it out:
I pulled out each ladder until I was down to the wrong cable, switched the order and keep the stitches live on a dpn.
Each ladder represents a row and every fourth row was a cable row.
I use the ladder as if it was my active yarn, making sure to tug on the first stitch. This will keep the cable from being to wonky. I then keep the middle stitches loose which will in turn make the last stitch fairly tight. When everything is said and done blocking will help any unevenness.
After a several long hours my St. Brigid is back on the right track.
Sigh. Now everything is right with the world!