Pictured here are the left and right surface of the inner side rotor. As you can see, only half of the disc has contact/grooves. While the outer side (not pictured) has full contact. Do you guys think this is normal? I've been going to the same dealership since day 1, I'm not really sure if they notice this or somehow i thought this is normal until today when they asked me that i need to replace my rotors and pads due to rust. I did not hear any mention about this situation.