Error In Transfer Of Land Ownership After Death Of Grandmother

I am kanwar Lal. My Grandmother was having 5 sons. In 1962, my Grandmother Kaanu Bai was having 11 hectare land (17 farms ) in her name. My father Kanhaiya Lal (Second Son of Kaanu Bai) died in 1982. After death of my father, my Grandmother transferred 1/4 (25%) share of Land in name of me and my brother Salagram because her others sons already got other land in their name in advance. So, the nomination of land was like this "Kaanu Bai 75%, Kanwar Lal & Salagram 25%". In 1986, Kaanu Bai died. After death of Kaanu bai, her 75% share was transferred to only her other 4 sons except us. So, Now nomination is like this "S1, S3, S4, S5 75% and Kanwar Lal & Salagram 25%". As per my understanding, there is a error in transfer of 75% share. It was supposed to transferred to his 4 sons and us. Nomination should be "S1, S3, S4, S5, Kanwar Lal & Salagram 75% and Kanwar Lal & Salagram 25 %". Today, I want to get corrected this error in revenue department database. Please guide me.