WIP: Basketweave Pencil Case (update)

So I've done several repeats of the basketweave pattern from the book but I'm getting a stockinette border along one edge that is not in the image of the pattern in the book. I've double and triple checked to make sure that I'm following the pattern correctly and I am but despite the border not being in the image in the book, it's most definitely in my knitting.

I know I can still work with it but still. =S Is this supposed to happen? Hmm...