I have used glue to baste with poly with great success, although not with a high loft batting. You didn't say how you put your layers together, but I always spread the glue onto the batting, drizzling in thin lines like you. I always starch the top/backing heavily which helps a lot. I also use a walking foot when quilting any straight lines. My first thought is that you didn't use enough glue as a poly batting seems to do well with more. You might also reduce the pressure on the presser foot. Good Luck!