The dangers of not making both socks simultaneously: Second sock (left) is smaller/nicer than the first sock. At least they will be good house socks.
This was a learning experience. When I next attempt 2-needle socks (argyles) I will use smaller needles and will have extras so I can work on one sock for a few inches, then the other. I have done this before to guarantee both socks in a pair are equally good or bad.
So here's to learning that I much prefer doing my socks in the round on double-pointed needles for best results. Now a picture of the socks flat, showing the seams. Second sock is on the right below.