Hindu family property partition

My grant-mother got 7 daughters(my aunties) and one son(my father) And, she had 5 acres of property in her name and after her demised, the entire property had been transferred to my father by patta in 1985. My father got 2 daughters and two sons. I am the eldest son and having one elder sister, one younger sister and one younger brother. My father gave me 1 acre(out of 5 acres) as a gift(thaana) settlement deed to me in 2006& constructed a house in that land using my income & by getting housing loan from SBI bank. At the time of executing gift(thaana) settlement deed, all my sisters & brother were major. After that, my father demised in 2012. I have three questions regarding above mentioned property. 1) Whether this settlement deed is valid for me? If yes, can I proceed the recovery of possession from my brother, as he & my younger sister are staying in that house? 2) Whether all my aunties have rights to ask property share(from the entire 5 acres) in the ancestral property? 3) My both sisters executed release deed in favour of me in Mar-2017 by way of consideration of Rs. 1 lac for each. Whether this is entitled only to me or will it be entitled for my brother also?