By the name it appears you are Hindu by religion. Since this is ancestral property, as said by you, after the death of your father, it will fall upon son, daughter, widow and mother and other legal heirs of the deceased under sec. 8 of Hindu Succession Act. As it is ancestral property, even the issues of the members shown above, are also eligible for share in the property.
You said "your father made in the name of me, my sister, my son and my daughter(4 parts)". How he had made is not mentioned by you i.e. by way of will, gift. Anyway your father is not having any right to make the whole property. He can make the property to the extent of his share only, not above that.
Coming to your case, on the death of your father, the property will go to you and your sister and the issues of you and your sisters and your second son as legal heir. (This succession will go upto 4 generations). Infact, it is not in your hands to add or delete any legal heir. Since it is ancestral property the property will automatically allotted as per the succession Act and coparcenery law.
Coming to joint property of your uncles and your father, you can file partition suit against the legal heirs of your uncles. If your uncles, at the time of their life, sold more than there share, without your knowledge, the purchaser of that extra property will be put to loss, it is dispute between the legal heirs of your uncles and the purchaser. You need not worry.