I had my 5,000 mile service done today on my 2014 triglide and told the dealer that I started hearing a faint noise when I applied the brakes. He called during the service and told me a rock or something got in between the rear rotor and the brake pad causing a groove to be cut in the rotor. He said not covered by warranty and would cost 94.00 for pads, 198.99 for rotor and maybe 1/2 hour of work. I declined at the present time and when I picked up my bike there was a "Dangerous condition exist" stamped on my invoice. Is this normal?