rotors

I have a 2011 DGC "Crew" that is going through brake rotors like crazy; it's in the shop now for three warped rotors (two rear, one front), and this is not the first time it's happened. Why do the rotors keep warping? Are the brakes under-engineered on these vans? My '06 DGC doesn't go through...

I have 2005 Dodge Dakota. Last June I did all four wheel brake job which is the front pads and rear shoes, Well, just now, I find the front right rotor warped (because a mechanic used a hammer to pound off the rotor to replace three studs). So now I want to replace the rotor. Maybe do the other...