Lever pulsates while braking
Assuming that you've already checked that the rotor is true (and out-of-true rotors are more responsible for rub than pulsation), I would take a micrometer and measure the thickness of the rotor in multiple places. You are likely to find that it was not machined correctly. Also, check the surface finish of the rotor on both sides. It doesn't matter what it is so much as that it is uniform, all the way around.