What brakes were on it? What MC are you using? Sounds like MC bore is too small. 4 piston calipers with 1.75 bores on all 4 corners needs a big bore MC like the Strange 1.125".

Not a fan of those prop valves. Unnecessary if the system's correct, but that's another conversation. Just make sure it's wide open when bleeding.

If the results don't match the theory, change the theory.