After knitting through an entire ball of Moda Vera 100% pure wool, I realized I had misread the pattern for the decrease row. The Libby pattern reads for 2 decreases each side of the back of the cardigan, to be repeated until so many stitches remain. I misread the pattern to read the decreases were repeated across the row, every 10 stitches. I did not like the look of the fabric and that's when I realized my error.
Proof that we all can make mistakes, even silly ones, and sometimes all it takes is a bit of brain fog from feeling unwell and taking pain killers!