Some helpful folks on Ravelry’s Men Who Knit group (and my patient wife) helped me figure out what I was doing wrong. I was knitting on the wrong side of the triangle. Now that I’ve got that sorted out, I have to get my tension under control. I’m knitting so tightly that I can barely do the increases.
I cast on a new hat last night, but as soon as I got to the end of the i-cord, and started my increases, I realized that the wrong side of the hat was on the outside, rather than safely inside, as it should have been. I must be making the transition from 2 to 4 dpn incorrectly.