Gaping Pockets

I made the city stroll in canvas. I adjusted the front so that the skirt lies flat on my tummy (I eliminated the darts and added some length to the front piece so that wraps as far as the start of the opposite pocket). Basically, the skirt fits. However, I find the pockets gape some. Anybody else have this issue? I'm not sure how to address it since, as I said, the skirt fits me and lies flat in the front and the side seams are not stressed. FYI - I made a size 0, with the modifications I described. I also tacked down the pocket about 1/3 of the way down (as shown in the photos) in an (unsuccessful) effort to stop the gape.