Based upon my research, I believe that your Generation 4 is not correct.
Stanton Prentice MD b. 1711 d. 09 Dec 1769. First married26 Jun 1740 Mercy Jennison (b. 11 Mar 1718 d. 26 Oct 1756) and second married 5 Jan 1758 Rebecca Stevens (b. 1736 d. 15 May 1823)
The children you have for Stanton are incorrectly distributed between the two wives based upon the birth dates and above marriage dates. In addition, there are a bunch more children; I believe 16 total. I will try to give you a more complete run down at a later time.
I am a descendant of Stanton and Rebecca's son, James Otis Prentice (who changed the name to Prentiss when he went to South Carolina) and have a lot of information on that branch of the family.