1. Supreme Court judgment that you have referred to relates to only the 2005 amendment made by the Parliament to Section 6 of Hindu Succession Act. The said amendment covers only the ancestral property, not the self acquired or separate property.
2. If the said property was the self acquired or separate property of father, and he died intestate, then it devolved through intestate succession on all his children equally. The share of every heir is 1/4th.
3. Both daughters are free to file a suit for partition to cull out their 1/4th share in the property and also seek a declaration that that partition deed is illegal.