Looks like there are two different people, George and Caldwell. George is living with his mother, Lily and step-father Marion Jeffers in the 1910 census:
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MGFD-PWG : accessed 16 September 2020), George Phillips in household of Marion Jeffers, Civil District 2, Scott, Tennessee, United States; citing enumeration district (ED) ED 163, sheet 4A, family 49, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1515; FHL microfilm 1,375,528.The 1910 census lists "George Phillips" as a step-son.
"Culwell Phillips" is living in 1910 with his mother "Bell", brother, and grandparents: "United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MGFD-JW6 : accessed 16 September 2020), Culwell Phillips in household of Jasper Terry, Civil District 3, Scott, Tennessee, United States; citing enumeration district (ED) ED 164, sheet 26B, family 470, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 1515; FHL microfilm 1,375,528.