Sale of ancestral property and share to the daughters

I live in Sirsi in Karnataka and am the only son with 4 sisters. My mother died long ago and my father died during 2002. After his death, the ownership of the ancestral property which was in his name was changed to my and all my 4 sisters name. Is this correct? As per the 9/9/2005 amendment to the succession of ancestral property my understanding is that since my father died prior to 2005 the property deed should not have featured any of my sisters and the ancestral property should have been in my sole name being the only son. If having the sisters name feature as co-owners was incorrect in the first place, can this be corrected/changed now? Now, if I want to sell off this property, do I need to split the returns with my sisters (or is it just because they feature as co-owners in the deed?). If yes, is that to be shared equally or what is the ratio? Two of my sisters have expired (2009 & 2013), so do their children need to be given the share? Please advice.