Saturday I was happily working away at the brown blob. Close to bedtime I looked down and four rows back I somehow switched my pattern and ended up with about four inches of purls on the left side.
I told my husband I'd see how things looked in the morning. His loving response, "What do you mean you'll see how it looks in the morning? It will still be wrong." Sadly he was correct, the sweater was still wrong in the morning. However in the morning I had remembered the whole trick of dropping a stitch down row by row and using a crochet hook to bring it back up the right way. It was annoying, but far less painful than frogging four rows of knitting. Sunday afternoon I finished up the back of the sweater.
I cast on for the right side of the cardigan. Three inches later I remembered that the k1p1 rib includes a knit stitch at the start and end of the row before the k1p1 rib. Thankfully this sweater is going really fast so it was only an hour or so later that I had the second piece set up properly and began working the Shaker Rib.