I am attempting to start a sweater with a gauge of 17 stitches per 4 inches using size 8 needles per the pattern. My local yarn shop did not have the yarn stated in the pattern, but suggested a substitute yarn that I ended up purchasing. I have stitched up 3 gauge swatches using size 8, 9 and now 10 needles, but I keep getting 19 stitches per 4 inches. Am I crazy? How can this keep happening? Do I need different yarn or different hands? Thanks for any insight.