One possibility is that your row gauge was larger than that of the pattern or your stitch gauge was tighter in proportion to your row gauge. I honestly don't know of a way that you could do it differently, though.
"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