I checked the recommended gauge on Fixation, and it is DK weight, giving you normally what you are getting - about 5 stitches an inch. The good news is your gauge is exactly right with the yarn you are using! The problem might be trying to make it work with your pattern, since it sounds like the pattern is calling for worsted weight. I am a little confused though - is your swatch measuring 51/2 inches, or are you getting 5.5 stitches per inch? If you want less stitches per inch, you want bigger needles - that should give you less.