Hi, I'm Karen hate knitting but really getting it together with my crochet! Just really confused by a baby pattern I have just bought. It consists of both dbl tr (double treble) and tr (treble stitches) From what I can make out on the internet these stitches are the same! Can someone please tell me where I am going wrong?! The motif I have crocheted using treble crochet has come out much too big! Help, I'm not that experienced! I'm sure there must be a simple explanation - I'm just not getting it!!

Thanks in advance,

Karen