The first I'm pretty sure can't be done.

The second sounds like it might have something to do with the mass of the attacking units and the properties on the phalanx. In EB most phalanxes have the "Light Spear" property. Maybe in vanilla they had "spear" which offers greater pushing power.

Maybe try and see if the same thing happens with Klerouchoi Phalangitai? Those, for some reason, still have the "spear" attribute.

If that gives the result you want, you could then swap the properties around in the EDU.