You've gotten a lot of information about how to do the wavy stitches. I had the jumping around problem - or at least a jumping around problem when I was free motion quilting and found that if I used some the bands for my hands from
Steady Betty that I no longer had that problem. Hmmmmm. Sounds confusing. Some people use garden gloves, some people use special gloves for FMQ and I like the things that fit around the palms of my hands and allow me to move the quilt sandwich more easily and smoothly. That's what helped me get rid of a lot of the hopes and bumps. Good luck.