Brake bleeding issue

Ok, this thing is kicking my ***. so, I bench bled the mc again just to make sure and it was fine. I took the distribution valve apart, blew it out and reassembled,did not find anything that looked wrong. Also blew the line from the distribution valve thru the wheel cylinders just to be sure there is no blockage. I then gravity bled starting with right rear and had steady drips out of all bleeders. thinking I was home free I had a friend pump up and hold the pedal,cracked the right rear and had pressurized fluid and air. Closed it up and pumped up again and cracked the same one and nothing came out and the pedal stayed hard. Never touched the other rear or the front bleeders, but when the pedal is pressed the front brakes are on. Don't know what else to try.