I see what is happening, but can't quite see why it might be happening. It is odd that it worked fine until you turned the corner and broke the needle. Could the needle be in wrong?? or could something have bent on the foot? I am betting you are using the SITD foot, and can see how something might get shifted out of line...although at the price of the foot it shouldn't. Why don't you check to see that the needle is in correctly. Turn the machine off, take off the foot, and just to make sure, try with a regular foot and straight stitching. If all that works well, then put the walking foot on with a different sole plate. It that works, then it may be the other sole plate is defective. If it doesn't then I would say you got a bum walking foot and ask for it to be replaced. Good luck, I wish I lived closer so I could run by and we could put our 2 heads together and find a solution.