I believe all of the above is correct except the last two you have listed as children were actually grandchildren.
Milton or Miller Cash and Thelma Cash were the children of Carl and Miriam Cash.
So, Warner Cash likely had 7 children (2 in first marriage and 5 in second marriage).
The parents of Warner Adolph Cash were Riley J. Cash and Elizabeth ":izzie" ___.
1880 Decatur, Dekalb Co. GA
Self Riley J. Cash M 30 Georgia, United States
Wife Elizabeth Cash F 29 Georgia, United States
Son Warner A. Cash M 6 Georgia, United States
Son Ebbie L. Cash M 4 Georgia, United States
Son Jerome Cash M 0 Georgia, United States
1920 Dekalb Co. GA
SELF Riley J Cash M 70y Georgia
WIFE Lizzy Cash F 70y Georgia
SON Warner Cash M 46y Georgia
SON Jerone J Cash M 40y Georgia
DAU Leona Cash F 37y Georgia
SON Arthur G Cash M 34y Georgia
Riley's son Warner is enumerated twice in 1920... here with his parents and also separately with his wife and children.
Attached is the WWI draft registration form filled out by Warner A. Cash.
Children of Warner A. Cash and first wife:
1. Clyde Cash, born about 1898
2. Carl H. Cash, born 3 Dec 1900 - married Miriam __.
Children of Warner A. Cash and Belle:
3. Clarence D. Cash, born 18 Nov 1909
4. Lola F. Cash, born 20 Feb 1912
5. Robert W. Cash, born 19 Jun 1913
6. Howard C. Cash, born 6 Jul 1918
7. Velma Dorothy Cash, born about 1921