One of my rear wheel lugs snapped around Thanksgiving. I was taking it to the dealer the next day anyway for a warranty LCA replacement, so I had them replace the stud. When I did my brakes last week, I noticed they reused the spindle nut. The locking tab was bent back and no longer lined up with the notch in the axle. I did what I could to knock the lip down into the notch to prevent it from backing out, but it doesn't have that hard edge that it originally had to bite in and lock it. Should I worry about this?