Help!!

Do you remember this? Eunny's Print O' the Wave stole. I'm going to get my diploma during a fancy ceremony in the City hall (the same place where the Nobel dinner is taking place) in the middle of December. My dress is soft lilac and I thought it would be perfect if I could finish the PO'W stole and wear it!

I've just started on the edging, and realised that I can't understand how I'm supposed to get the decreases right. If anyone has ad the same problem, let me know the answer to it!! Anyone who's interested in having a look at the pattern of the edge can find it here. Please, knitters out there, I need your help for this one!