Those don't look like factory 11.75 rotors, they look more like a C body rotor with a longer nose. Could be junk Chinese rotors. When I was doing brake kits I used to keep an original factory 11.75 rotor on hand to use for checking dimensions. The rotors from China were garbage. The ones made in Mexico usually fit okay but were not high quality. The highest quality rotors came from Canada. Here is a picture of an 11.75 rotor that fits. Look at the shape and you'll see that it is very different than the rotor that you have.