Hmm, no, that doesn't add up. It doesn't work for the small size, either.
Where is the pattern from? Maybe you could check the publisher's site for errata.
Another thing to check is what the numbers say for the back of the pattern? How many stitches are you supposed to end up with for the other side of the shoulders? Maybe we can work from that.
"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