If your engine shifted on the mounts then the rubbers were bad.(they do go bad)I have two cars with floaters,and two with stock mounts.I really can't tell the difference between them.If I have somebody stomp hard on the brake pedal while I watch the mounts,the floater does not move one iota more than the stock mount does.But,both are installed correctly.With the stock mount there should be no metal to metal contact.If there is,there is something wrong.If the floaters are crooked,don't line up,or if they twist the rubbers to the side,something is wrong there too.