The brakes self-adjust constantly while you're using the brakes, that's how they remain correctly-situated as the pad wears down. That also means burning them down a bit at an auto-x isn't going to change how they fit
As the pads wear, the resting state of the pistons in the calipers when you're not braking will slowly adjust inwards to make up the distance. This also results in a small drop in brake fluid level over time as the pads wear.
It may feel like a lot of drag to you spinning the wheel with your hands, but it's absolutely nothing to the car (assuming everything is normal with your brakes, which I suspect is the case).