It looks to me that rows 11-18 are the shaping for the sleeve cap--from the armpit to the top of the shoulder.
It looks like you're supposed to work rows 1-10 over and over until the length is to the armhole shaping.
"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