The yarns were supposed to all be Cascade 220 Superwash. In my frenzy to find the last couple of colors, I screwed up. Two of them are non-superwash. The texture's a bit different between the two kinds. I might use them anyway. Hmmm, maybe somebody on Ravelry has those colors that they want to sell or trade. Stay tuned.
Update:I had the good sense to check things out on Ravelry. The Superwash is more of a light worsted, so the two yarns really aren't compatible. I found a place that had both of the colors. I don't think I would've run across it otherwise. It's called Coveted Yarn.