My instructions are for a sweater and this is for shaping the armhole, confused!!! the instructions read 1st row - PAT across 14 sts. Cast off 16 sts loosely. PAT across 8 sts Place marker at end of row. 2nd row- (this is where I am having a problem) Cast on 16 sts over cast off sts. PAT to end of row. How do I cast on over cast off sts?