Row 13 has a missing "pass the slipped stitch over" within the repeat.
Row 17 has a missing "at the end of the row, knit 2 together"
Rows 1-11 as written won't allow for vertical repeats since the stitch count increases by one in row 13. (A fairly experienced knitter would sail through this without blinking, …
Row 13 has a missing "pass the slipped stitch over" within the repeat.
Row 17 has a missing "at the end of the row, knit 2 together"
Rows 1-11 as written won't allow for vertical repeats since the stitch count increases by one in row 13. (A fairly experienced knitter would sail through this without blinking, but a computer needs more consistency than that.) I've added an extra knit stitch to those rows (and changed the starting k1 on row 13 to k2tog) balance things out.