Makes no odds what order you do it in IME, most likely is all that pumping to the floor has fucked the master seals, i only ever use an easybleed on old master cylinders
All the years of a short travel wears the master bore then somone stamps on the pedal and the ridge at the end of the wear area nips the tipas of the seals off ?
Not a deffo but a high possability, you can't clamp off to test if you have braided hoses
It could be all the new piston sizes are too large for old master to move enough fluid but if it's a tried and tested setup i doubt it ?