I am adding a different color the instructions are in the ribbing on a sleeve. I have been k1 p1 for a few rows, creating the ribbing. It now says to knit the next row with the new color. Next row rib to the end with the new color. Do I start with a K1, P1 or start with P1,K1. Confused about that whole row of knit in the ribbing. Should it have been a whole purl row following the knit row instead of returning to a rib row?