schnurke

Hello everyone...My name is Karen, and I am finally getting started on my basic square-patch quilting projects. I am a new sewer...I was just given a Singer Talent 3321 machine, and I consistently get loops on the back of my patches at the top (see attached images) when I sew on it. What does this mean, can anyone tell me? What is strange to me at least is that the stitching works itself out after the problem. ? Thanks if you can help, Karen