You'll have to start knitting with a new strand on the second shoulder. Just start knitting and you can weave in the end later. Not a big deal.
You can't bind off at the end of a row. When they say to reverse shaping, do the same number of bindoffs, but do them at the appropriate edge. Don't think if it as knit and purl, think of the shoulder as having a neck edge and an arm edge. So whatever you did on the knit side before, do on the purl side.
"Trust the pattern!"
Time flies like an arrow, but fruit flies like a banana.
Hop aboard while we follow the cloud-covered van of knitting harmony, man!! Woooo!! --Hedgehog
IngridKH on Ravelry