g6e problems

So I purchased sealed wheel hubs and brake rotors on ebay and installed them. The first drive for 10 minutes at 100km/h the wheel hub was smoking and really hot and the hub doesn't fit with the rotors the rotors said they fit fg xr6 and the hubs said they fit fg. Is there a difference and why is the stud holes too big in the rotor causing them to wobble and knock. What do I do? Do I just get new hubs to fit the rotors.