Just noticed it was warm in the kitchen and come to find out my oven is on. The knob is set to off, but it won't kill the flames! The knob isn't stripped as I pulled it off and turned the shaft itself, still no luck. It does seem the shaft part that the knob goes on seems to move easily and in several directions like a joystIck instead of just rotating. For now I have pulled the oven away from the wall and shut off the gas valve to it. Anyone heard of this before? What could it be and more importantly, how much is it going to cost me?!?