Finally, I admit that something is wrong. Diamonds don't normally have 6 points. I had copied the chart for the socks into excel so that I didn't have to carry the book around, and I figured that I simply copied the chart incorrectly and that I am incapable of reading said chart. After knitting 2 rows, I carefully frogged the pattern rows back to the beginning (that's about 7 rows), only to realize that I had opened the project for Fred's surprise project instead of the diamond gansey project. I started knitting row 6 when I should have been knitting row 8.
Lesson: If you're going to use technology to make knitting easier, at least make sure you open the right project or you'll get to do unnecessary frogging.