Regarding parental property distribution

My Grandfather get the residence property through registered distribution deeds there my grand father get 57 dhur area with residence plot number.My Grandfather have three son including my father and my family was living in 19 dhur exactly to build home with self exoences and only two room was allowed to my father from ten room constructed house of Grandfather.we were living separated to close the connectivity from Grandfather house after his death and property was not distributed on paper and we are living in our separate 19dhur since long 25 year now after 25 year my uncle sons are claiming one room around 1.50 dhur from our 19 dhur and asking to measurement the actual position but we were totally separated from the area which our grandfather allotted to us at their lifetime. Now while I was constructing my old two room and after giving the 7.5 pillers and bimbs they come to fight with us for 1.50 dhur and they are saying two dhur land is shorted in their position.just wants to know can I stand legally on my 19 dhur land ?