Help after a front brake job

[namari]

Just changed my front brake pads. The new ones were hard to put back on (yes, I pushed the piston back flush before putting the new pads in), and I had to sand them down a little to get them to slide on. Once on and torqued to specs, I pumped the brake, then took it out for a spin. Just a mile, but the whole time it felt like I was riding with my front brakes on. When I got back, the front rotor was piping hot too. Is this normal? With a few miles will the brakes wear down or loosen up a little? Or am I missing something? Thanks!