I will use generation labels instead of names to make it easier to tell these people apart.
The characters:
Mother: Sarah “Sallie” Curry born about 1793 Sarah "Sally" Curry (Taylor)
Father: Barnabus Curry born in 1789.
Daughter: Susannah Curry Rader Susannah Rider
Granddaughter: Hannah Rader Vance born 1794 Hannah Vance
Great-grandaughter: Susannah Vance Ellis born 1815 Susannah Ellis
The problem: According to their profiles, Mother and Granddaughter were born 5 years apart. Daughter is about 16 years older than either one of them.
There’s very little online information about Mother and Daughter and their husbands.
Daughter, Grandaughter, and Great-Granddaughter are all named Susannah or Hannah, which is a reasonable nickname for Susannah. Mother is named Sarah/Sallie which is also pretty close to Susannah. It would be very easy to mix them up.
I think that Mother and Granddaughter are the same person with different husbands assigned to them.
MyHeritage has some information on Daughter and her husband John Rader. They say Daughter was born in 1767 and John Rader was born around 1760. That’s an appropriate age for the parents of Mother/Grandmother. Daughter’s maiden name is Curry.
There are no problems with Great-Grandaughter apart from the fact that her ancestry is a mess.
This leaves the question of who Father is. His birthdate is appropriate for a son of John Rader and Susannah Curry Rader (Daughter) but he has the wrong last name. He might be Daughter’s child from a previous relationship, or he might be a family member such a nephew.
Side issue: Great-granddaughter’s husband William Harvey Vance has 8 profiles that probably ought to be merged. I have no doubt that he is real. The master profile for his sister Elizabeth Vance shows him as being both her husband and her brother. She never married and is the grandmother of “Devil Anse” Hatfield of Hatfield and McCoy fame. Here’s her profile: Elizabeth Vance The link to her husband/brother’s profile is very incomplete. I started a discussion about the husband/brother issue on Elizabeth’s profile but didn’t talk about how many other profiles he has.