The pattern is for a Plymouth Baby Alpaca Grande Vest. I purchased it, so all I can give you is the photo link: http://store.nobleknits.com/plonepive.html
It was a co 120, then in rib K2 P2, then it had a K2tog, P2tog decrease across to get to 60 stitches. Then it was in stockinette until the increase row. the exact wording of the increase is "K1, M1, P in front and back of st; repeat across row (120 sts)."
It does seem weird, but unless they made a mistake, then I am doing it wrong. I thought maybe if I just did a straight up K in front and back increase instead, but I am not sure how that will work when I go back to the ribbing (which ends the pattern).