Adoption deed+change/correction in name of donor mother and child name

Dear Sirs, I am the child who was adopted on birth by elder real brother (blood relation) of my biological father and when i 2yr 5 months old, an adoption deed was made and registered with Sub-Registrar of the District ONLY. Both my biological mother + father and my current mother + father are living as on date. Now there are few issues: 1. My name in my Adoption Deed and Birth Certificate is "ANKUSH" BUT in all my documents including aadhar card, pan card, class 10th and all academic documents and ration card of recepient parents, it's "ANKUR BANSAL". Can we change my name or make correction or enter alias name in my Birth Certificate and adoption deed? 2. My biological mother's name is also different in adoption deed and birth certificate. Can we change my biological mother's name in my adoption deed through affidavit/ suuplemental deed? or Can we change my biological mother's name in my birth certificate itself? 3. Since the adoption deed was registered with Sub-Registrar of the District only and we were supposed to register it with municipal corporation as well which we didn't. Can we get it registered now when i am now 25 yrs old as april 2018. If yes, then will i get a new Birth certificate with my current parents name into it.? 4. In future, How can i ensure safety of my rights as a legal heir of my current parents? 5. If my adoption deed is not registered with municipal corporation, then will i continue to be a legal heir of my biological parents? You may contact me anytime on email or handphone. Thanking you in anticipation. Ankur Bansal