I've heard of gauge changing when you go from knitting in the round to knitting straight, but every third row? That is odd. I can't think of anything to help, just to agree that it's odd.
"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