I'm making an afghan and one row has me stumped. It reads........yo, k1, yo, p 3.......I get the yo k1, but isn't the yarn already over when you do a purl, so what's the point? The row has 4 yo's which increases the number of stitches by 4, but two are with knit stitches and 2 are with the purl. Hope this makes sense. Thanks for your help.