I'm hoping someone can help understand a part of the pattern instructions of the vest I am knitting. The part I'm having trouble understanding is on shaping the armhole. It goes like this: NEXT ROW work 4 garter sts, 10 sts in St st., 36 sts in Garter st., 10 sts in St st, 4 sts in Garter st..--------What is the difference in the 2 sts as they are worked in the same row. I always thought St st was one row of knitting and one row of purling, and I thought garter st. was just straight knitting. So I'm rather confused on how to knit this particular row. Will be very thankful for any help I can get.