Well, I hate to admit it, but the mystery stripe in my sweater has been solved. I was showing it to my husband tonight and touched the stripe. I noticed the yarn was rather rough compared to the softer yarn of the darker color. That was when it dawned on me.
When I ordered my yarn from Knitpicks, I also ordered yarn for my son’s new cardigan. His sweater will be in orange and brown. I ordered 7 skeins of Swish Worsted Superwash in Truffle for my mom’s sweater:
Along with 3 skeins of Chocolate Wool Of The Andes:
And while they look different in the pictures here, when you look at them in the box, in a darkened office lit only by the computer screen, it is easy to mix them up. And obviously that is exactly what I did!
So now I feel really dumb! It wasn’t an issue of non-matching dye-lots. It was the fact that I used a completely different yarn!!!
I think I will work on socks for a while. I can get a whole sock out of one skein of yarn, so at least this problem won’t occur with those!