where you are continually warping one piece disks, they are being used beyond their heat range, OR the pads are contributing to the higher surface temps.
LCR's are heavy cars, pedal feel is light, so you dont really appreciate how much work the brakes are doing when you are pressing on.
2-piece rotors go some ways to reducing the heat build up, BUT there is no such thing as an indestrucable disk brake setup in my experience of hard (race) use