that is weird ...I use fleece on all my quilts. I spray baste ( reg. stuff from Joanns) the top to the batting then the top and batting to the polar fleece ( I use the 100% polyester batting.low loft it sticks well and is cheap and very warm) to the top and the fleece) and I have no trouble with sewing it together. I stitch in the ditch and there is no stretching I have even used very stretchy fuzzy backing and it turned out fine...could it be the batting?? the quilts were only 62 X 62" though .