Aa-Haa! I thought there must be some reason for this. Particularly as they are two different patterns and they both say the same thing no matter how many times I look at them.
I have another pattern for a short double rib scarf however, and that is worked on an even number with knit coming under purl and vice versa, in other words the way I think of ribbing.
I presume the odd K stitches at the end of every other row are to help when you sew the two sides together - right?
So are there two ways of doing double rib? Is one better than the other?