Bind off 4 sts at beginning of next 2 rows. Ok, got that.
Row 1: K1, slip 1, pass slipped stitch over, work to last 3 sts. K2 together, K1. This is where I’m confused. Don’t you usually slip 1 K1 then pass slipped stitch over?
Row 2: Purl. Repeat these 2 rows until 24 sts remain finishing on a purl row.