Sale of ancestral property and share to the daughters

I live in Karnataka and am the only son to my father who died during 2002. My mother died much earlier and I do have 4 sisters. After my father's death, the ownership of the ancestral property which was in my father's 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 one of the owner was incorrect in the first place, can this be corrected/changed now? Now, I am looking forward to selling off this property and would like to know if as per law do I need to split the returns with my sisters (or is it just because they feature as one of the owners in the deed?). If yes, is that to be shared equally between all the siblings? I am told that I being the only son would gain 50% and the rest 50% would be split equally amongst the siblings effectively providing me 60% of the returns. Is this correct? Also, if any of my sisters (as owners to the property) object to the sale, can I sell off my share of the property and does this need for the property to be partitioned? Now, 2 of my sisters have passed away during 2009 and 2013. Would that mean that if the returns are to be shared, her share now needs to be passed on to my dead sister's children? Please advice.