Did you get the washer/spacers in exactly the same sequence? I did NOT the first time I did it and got the dragging of the rear wheel when spun manually. Maybe there chould be a connection? I know that the orientation of the washers makes a difference and maybe it has an effect on the brakes. Did you take good photos of things before you pulled it apart?
it took me a couple of times to get them right. next time I will take pictures