I've made this same pattern three times now and have had the same wrinkly, gathered chest issue each time.
I had to cut one of the back panels upside down as I ran out of the fabric.
I wore this dress down the street the other day and a woman stopped me to tell me that my dress fabric had been her tablecloth. My immediate thought was that this is definitely one of the down sides of living in such a small town, until she told me that she was so excited by what I had made that she was going to go home and go through her linens to see if she had any more for me. Yay!
I probably should have a few dressmaking lessons.
I've got to say though, that I am a bit hooked on making clothes for myself.
I hope wherever you are that you are having a lovely weekend.