Power disc brake conversion kit troubles.

The brake pedal sometimes does not return causing the brake lights to stay on. It seems like with the engine off it works just fine. I don’t see a return spring on the pedal and do not know what would cause this. The caps on the master cylinder reservoir leak out brake fluid as well. The car originally had no power drum brakes all the way around. All the brake components are new, other than the warning switch. It’s got discs in the front and drums in the rear. And it had none of these issues beforehand.