You still have air in the system. The brakes should be bled right rear, left rear, right front, left front.
However I would think that you have full ABS and that can complicate matters. Sometimes you need a scanner that can cycle the ABS solenoids while bleeding.
I assume you did bench bleed the new master cylinder so I would try bleeding the brakes again, maybe closing each bleed screw before the pedal is released each time.
It can be a real PITA to get all the air out.