Regarding ancestor property purchase

Case Summary:

1. Property Background:

   • The property in question originally belonged to my super grandfather( he has two sons).
   • Despite not being under my father's or grandfather's name, but my family has resided there for over 70 years.

2. Legal Dispute Overview:

   • After 60yrs descendants of my father's uncle sons (my grandfather's brother's sons) claimed a share in the property as it was there under my super grand father name.
   • As my grand father expired and my father thought the property partition done during their father's time, which my father disputed due to longstanding occupancy.

3. Sequence of Events:

   • My father's brothers sons sold the property to a third party without my family's knowledge.
   • Subsequently, as the same time with neighbours sugestions my father sold the property to another individual, with both transactions recorded in the Encumbrance Certificate (EC).

4. Current Situation:

   • Due to some circumstances I  now wish to purchase the property from the person to whom my father sold it.

5. Legal Questions:

   • Now this case is on court since 12years Can I legally register my name for the same property given the double registration and the EC showing both parties' names?
   • At the end the property belongs to whom. is it good to register my name do i face any issue if i register the property when the case is on court.
     
     Please answer/advice my question
     Sorry for my bad english