i don't have this problem but i am using a pfaff hobby 1200. best thing for quilting i think. it has this neat little edger you can screw on for keeping the fabric in line at whatever measure you want. it's better that the usual 1/4 quilting foot. it really keeps the fabric in line and my seams always line up = well, almost always! worth looking into if you are buying a new machine.
Jeanne