It seems to mean that you have a pair of yo's. You want the same number of yo's on each end of the rows. It seems somewhat unnecessary to me to include that as it's confusing, but maybe it's included for a reason. Just work the stitches as indicated and you should be fine. Have you seen a video for doing toes this way? http://www.youtube.com/watch?v=gEEX_L0V_iQ
I've not done toes like this myself and would be interested in knowing how it goes for you.