IF after you have bled the MC (procedure in brake forum), and you have bled the rest of the system, press and hold the brake pedal. If it sinks then the MC is leaking internally. If it just feels spongy then there is still air in the system.
Not to scare you, but I had two Wilwood 1 inch MCs fail out of the box. They would not hold pressure.
Did you adjust the MC push rod?