Hi there,
I don't know what to tell you. I must have been lucky...
As I had no problems with the two I did for my grand nieces for Christmas. I pinned every 6 - 8 inches, plain foot, no batting. Just the toppers and the fleece. After creating 6 and 8 inch grids I free form quilted 6 inch flowers on one quilt and 5 inch drafonflys on the other. Polycotton thread.
Most likely because no batting was used. I figured they would be plenty warm with only fleece like one from my childhood.
Suz