xTraViSx

i recently had my rotors turned and new brake pads put on a few months ago. When i took the car in it was hopping like it is now. only does it under braking. The hopping turned out to be a problem with my caliper and i had to replace it. It was fine for a few months but now its hopping again. i think its the side that wasnt replaced now. Sometimes i can hear the brake pad pulsing on the rotor when im alpying the brakes hard. I was just wondering if the problem may be the caliper?