I'm making my first vest, and I don't understand how to shape the shoulders. The vest is made in one piece, except you sew the shoulders. The pattern states: "Bind off at each arm edge (4 sts) twice, then (3) once. Bind off remaining (16) stitches for back neck". Now, there's only 38 stitches total, so am I bounding off all these stitches? By the time I bind all these off, that's all 38 stitches. Maybe I'm binding off the wrong edges--I don't understand. Can someone explain this to me? I guess I've been struck by a "dumb stick"!