brake bleeding firm now spongie.

Okay for starters I've done quite a few brake jobs and a few disc brake swaps but never had this problem.

I installed a 1985 5th Ave rebuilt mc (bench bled) with the ar engineering adapter plate using the stock push rod. The disc brakes are 73+ with the proportioning valve from the same car. Front calipers are rebuilt units with new brake lines and hoses. Both with copper gaskets one on each side of the line at the caliper. The rear are 10" drums with new wheel cylinders.

I bled the wheels starting from the back right like I always do and work my way around farthest from the mc to the closest. Everything was going good and had no leaks that I can see but when I bleed the front right the peddle goes to ****. And takes 4-6 pumps to build back up. But I see no air (I use a home made setup with a mayson jar hard brake line and clean rubber hose to the bleeder). Go to the next and still no air. So I got to thinking about how some say the fronts are a pain to bleed and my bleeders are facing forward and the car was level on Jack stands so I jacked the front up another 2-3 inches and try again. And got some air out of the front right. And none from the front left. So I go to bleed the whole system from the beginning again and my buddy says the peddle feels like **** in the time it takes me to go from one side to the other. Any ideas as to what's going on? I'm letting it sit and doing other things hoping the air in the system will settle and can push it out.