I had this happen a few years ago, though in a slightly different fashion. The same "model" of sock was around, but the design changed once (width of stripes) and the material/construction quality changed several times. So despite having had ~15 pairs of the "same" socks, I still had to match because otherwise they would feel different on my feet. That's obviously not an issue in the grand scheme of things, but it bothered me :)
