to salmonmac: you might be right... it does make sense, even if it's not so.
Funny story about the blue socks yardage. When I finished the first sock, and realized that it was too long, I asked my husband to weight the remaining yarn to see if I have enough because the skein looked suspiciously small. He went to the lab, used very precise scales and reported his findings. Sock weight: 23.8 g, yarn weight: 23.8 g. How random is that?