This is my first time knitting with circular needles. It is a small tote with wide color stripes. I understand the fact that knitting every round in a knit stich generates a stockingette stitch. I got started just fine and worked 2 inches in the first color. The I switched to the second color and continued. Then suddenly I noticed that the "right sides" of each color were on different sides. One one side I have the right side of my first color for 2 inches and then a few rows of the wrong side of my second color. And vice-versa on the other side. How the heck did that happen? What did I do wrong?