i tried tightening the bolts, tightening the screw on the rotor although it keeps coming back when i slow down it makes this screechy noise although i have alot of meat left and this is even when it heats up, and when i go to slow down instantly it sounds like the rotor makes a clunk and a piece of metal scrapes againts my brake pad as im slowing down.

the rotor moves independently just slightly forward and backwards