C-27 (I2b1) DNA Test: James Carson of Ireland to South Carolina

[Stephanie Carson Feldman]

Do you have research/information/comments to add to this genealogical line?  Feel free to post and please indicate your sources!!
http://www.worldfamilies.net/surnames/carson/pats

C-27 James Carson, b c 1710 Ireland, d 1778 York Co SC - Scott Carson [rangeseeker AT sbcglobal.net]
    * Andrew Carson, b 1744 Antrim Co Ireland, d 1799 Lincoln Co NC, m Margaret Blackwood
          o John Carson, b c1767, d 1839 Barry Co MO, m Janet Willson
                + Andrew Carson, b 1788 Lincoln Co NC, m Elizabeth Gaston
                      # John W. Carson, b 1817 KY, m1 Martha Williams Edwards, m2 Jane Ingels, m3 Jemima Barber Edwards
                            * Margaret Jane Carson, b1838 IL, m Philip Stout
                            * Mary Eleanor Carson, b 1839 MO, m1 William Walter Rice, m2 Thomas A. Jett
                            * Harriet Jemima Carson, b 1844 IL, m Samuel Lewis Stout b
                            * Louisa Matilda Carson, b 1847 IL
                            * William Andrew Hodges Carson, b 1848 IL
                            * John W. Carson, b c1851 IL
                            * Robert Jackson Carson, b c1853 IL, m1 Avy Bryan, m2 Lucy Alice Cartright
                                  o Wittie Melinda Carson, b 1881 TX, m James Walter Cartright
                                  o Rose Carson, b 1887 OK
                                  o Arminda M. Carson, b 1889 OK
                                  o Cora Olive Carson, b 1891 OK, m James Osro Bennett
                                  o Thomas James Carson, b 1892 OK, m1 Ada May Hancock, m2 Ruth Jones
                                  o Julia Kathryn Carson, b 1893 OK, m Henry Richard Tapp
                            * James Porter Carson, b 1854 IL, m Hattie Eliza Pollock
                            * Charles N. Carson, b c1856 IL, m Charlotte M. Smith
                            * Julia Ann Carson, b 1861 MO, m George Willis Mitchell

[Stephanie Carson Feldman]

This Carson lineage is I2b1, Nordic.  It does not connect with the R1b1 lines for many thousands of years back.

C-15, C-21 and C-27 are 34/37 and 33/37 matches so their common ancestor could be within a thousand years, but the paper trail has not yet confirmed who it is and likely never will.

There is an unusual development in this lineage.  It appears that markers CDYa and CDYb (724) have fused back together.  It was not a six jump step from 31-37 to 37-37, but likely just one.  And not seven steps from 31-37 to 36-36, but likely only two.  Family Tree DNA's ancestor predictor will not be accurate if comparing test results that do not have the same markers for CDYa and CDYb.

Further speculation on Haplogroup I - Lineage I-B should go here:
http://www.worldfamilies.net/forum/index.php?topic=8399.0