05 Taco Brake Rotor Issue?

Not to sure what this could be but when I installed my new brake rotors from EBC along with their yellow pads and they were awsome, but after about 5k miles I noticed vibrations whenever I would brake at highway speeds. Took off the tire and inspected the rotor and it seems to "wobble" in and out as I manually rotated it. Removed it, cleaned the mounting surface installed it and still had the same issue. Could this be a bad hub assembly, has anybody experienced this before? Any advice is greatly appreciated.

 

Wobble where, the brake surface or the whole thing? Did you try and put a couple of lug nuts on hand tight with the wheel off to spin it and test it? Did you tighten your lugs E V E N L Y with a torque wrench as not to warp it? Did you use the Toyota spec of 86 foot pounds (if I remember correctly) or did you Magilla Gorilla it?