on my blaster i noticed my rear brakes are wearing only one side of the pad...i replaced them like 3 weeks ago and already it is doing it again...the caliper is stationary not on pins...but it looks like the disk is supposed to move back and fourth instead of the caliper but its not it is on splines. am i correct i sprayed some lube on it and letting it soak a bit. i used a brass hammer and tapped close to the center back and fourth lightly and no movement ..if it is supposed to move no biggie i can get it freed up i just dont want to brake it tring to move it if id doesent