google your machine name and model and backwards and see what comes up. We did this once with another type of machine during a class when it happened to one of my students. Sure enough there was information out there and we got it resolved. Turned out that it was stuck in the buttonhole stitch mode and it was thinking it was making the one side of the buttonhole. Weird, but check that out to make sure its not stuck in button hole mode. Good luck. And yes, I agree with the others, find another repair shop. Its a beauty.