You need to better stabilize the fabric...........I use a fusible very light weight cotton called "PRESTO" and fuse on the back of the fabric I am embroidering..............I then use a high quality stabilizer (read that FLORIANI) and I hoop both stabilizer and fabric. I use a heavy weight tear away or a medium cut away, depending on the project. Stabilizer that is too light for the dense satin stitches will cause your design to pucker.