Is my tail light coming off because my exhaust?

I bought a muffler from pep boys and some piping, i cut off the stock muffler and clamped them on. I know it wasn't professional or anything. But now my tail light above the muffler is slowly coming off and the bumper is too! Any idea what i can do to stop it from coming off? Please and thank you. Its a 2012 honda accord.

You could install a exhaust tip to extend it past the bumper

A muffler does not allow a tail light to come off nor a bumper. Lay of the drugs son, you are messed up.