If it is in Daadi's name, may be she put it on Pragya's name so that it is saved from Tannu and Aaliyah.
PS: Can Pragya not remove Aaliyah from Mehra mansion easily using her murder attempt on BB which she admitted to and which was actually witnessed by herself and all Aroras? BB would sure be with her if she wants to put Aalu in jail for it. If Aalu is sent to jail, isn't the problem solved?