I have only made one double wedding ring, I used Marti Michels templates and it came together great. But here's my advice to try to help. First are you using thin pins? Not the yellow headed ball ones. I use the thinnest glass head pins I can find, they are long and thin and bend easily. They take less of a bite out of the fabric and don't distort. Then, pin, two pins on each end to keep the tiny ends from splaying out, one in the middle and two on either side of the center pin. Yes, that is 9 pins. But it works. I was taught by a friend when doing curves. There is a belly, the round part fabric and a shirt, the other fabric part which is stretched out on the sides. When you sew, sew with the shirt covering the belly. Why it works I don't know, it just does. Next, the quilt is assembled block by block in a serpentine seam. One by one. if you try to assemble all the blocks then join them together, it doesn't work or you have lots of y seams which are unnecessary. Hope it helps.