My shifter knob rotates both clockwise and c-clockwise when I apply a moderate amount of force to it. I have tried to tighten it, but it just keeps going around, never getting more loose or more tight. Driving over time, it rotates and I constantly have to adjust it. I don't know if it is supposed to be glued on, or screwed on, but if it is the latter, it is clearly stripped. Anyone else know if this is normal? Again, it doesn't move unless I apply a decent amount of force, but I would expect zero play in it.