Swapped to disc and now horrible scraping Help

Let me update : I ordered a new set of pads, Wagner MX215. The ones that came with the calipers were Hawk. Well the Hawk pad has a small round nub that is supposed to center the pad in the caliper. The caliper has a large round hole for that nub, way too much play. The Wagner pads have a different elongated nub that actually centers and fits properly into the caliper.
When I installed the Wagner pad, everything works great, no scraping. See my pics:
caliper centering holes - 1.jpg caliper centering holes2 - 1.jpg pad nub - 1.jpg