Hi! I've been following the pattern precisely and when I got to the sleeves, I pinned and sewed right sides together, as stated. When it came time to sew the side seam, I started thinking, "This isn't going to turn out right..." and sure enough, the dress was right side out and the sleeves weren't. What did I do wrong? I've done a set-in sleeve like this once before but haven't had this problem. Thanks!