brake bleeding..WTF?

didnt make lines, only bought them premade.
used distribution block out of disk/drum car
Ill gravity bleed rears as advised but still questioning why a dual system doesnt give a hard pedal when one is working properly and the other is shot (never happened to me, is that just how it works when one is down?) thanks.

ok just saw last post. Ill do rears and see if that helps.