When I posted an update to the sock pattern with a new heel, I included notes for using a ch-2 net stitch instead of the sc/dc (brick) stitch pattern of the original sock published on the South Bay Crochet website ages ago.
Unfortunately, the instructions for the afterthought heel in net stitch makes a huge heel that is not appropriate. It is just plain wrong. Each ch2 space should be worked as 1sc for a heel the right size.
I am reworking the toe, too, so will post a new, shorter pattern. With any luck, it will work just fine.