What was it before you quilted it....was it two colors as shown or did you add the straight edge....looks like somewhere in the construction of it,it became wonky and the intense quilting just added to it....or .....what kind of fabric is it..linen.if so the weave is looser than cotton and that may have stretched it with the quilting....just some thoughts to try to figure out why......try blocking with a wet cloth steaming as it lay on top of the scarf