recent and old gravestones show different birth years

Cemetery list shows "MOORE, JOHN" owns 24 adjacent plots of probable family member below. List shows that GEORGE is buried in two adjacent LOTS owned by 2 persons. Likely a clerical error

COLLET, HAROLD -b.09/22/1892 -d.09/26/1892
HANSEN, ALDON -b.7/22/1900 -d.8/22/1901
HUGHES, GEORGE D -b.05/21/1873 -d.2/3/1920
HUGHES, GEORGE JENNINGS -b.6/8/1906 -d.11/14/1908
MOORE, CAROLINE -b.03/01/1844 -d.05/09/1878
MOORE, JOHN -b.10/04/1838 -d.2/20/1920
MOORE, MARTHA DAVIS -b.12/16/1862 -d.2/7/1946
MOORE, JOHN WEST -b.09/05/1861 -d.1/26/1949
HUGHES, ALICE MOORE -b.06/17/1876 -d.9/16/1947
MOORE, LEON -b.05/14/1893 -d.08/24/1893
MOORE, LEO -b.09/22/1888 -d.02/21/1890
MOORE, JOHN WEST -b.01/05/1892 -d.09/06/1893
MOORE, RALPH DAVIS -b.7/20/1900 -d.8/1/1900
GILLISPIE, REED MOORE -b.8/20/1903 -d.10/7/1904
HICKS, MARTHA ANN -b.03/05/1815 -d.04/02/1885
HICKS, GEORGE BARTON -b.12/14/1803 -d.12/13/1885
MOORE, INFANT SON -b.08/13/1887 -d.3/25/1901
MOORE, ELMO -b.9/1/1903 -d.3/25/1904
MOORE, MALE -b.08/03/1887 -d.08/03/1887
MOORE, MALE -b.05/01/1886 -d.05/01/1886
DAVIS, MYRTLE -b.07/12/1888 -d.12/21/1888
DAVIS, MARY -b.08/15/1887 -d.08/16/1887
MOORE, (NO GIVEN NAME) -b.02/28/1889 -d.02/28/1889

dual occupancy of plot -- 04-22-24 --
MOORE, GEORGE -b.08/20/1893 -d.12/15/1899
(MOORE,) HUGHES NO INFO AT ALL

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SpanFork interment list shows "SILER, JANE" owns 10 adjacent plots of probable family members below. List does not show any other info abt GEORGE B HICKS

SILER, MANGEL -b.09/24/1891 -d.09/19/1895
ELLISON, JOHN -b.11/18/1892 -d.01/27/1897
WILSON, MARTHA A -b.03/05/1815 -d.04/02/1885
HICKS, GEORGE B -b.12/25/1803 -d.01/13/1885
HICKS, GEORGE A -b.01/14/1835 -d.6/28/1926
HICKS, ELIZABETH M -b.05/06/1837 -d.1/29/1922
HICKS, WILLIAM EDWARD -b.05/08/1898 -d.9/4/1911
SILER, LYNN -b.04/05/1893 -d.2/9/1907
SILER, JANE HICKS -b.05/23/1867 -d.3/17/1948
SILER, HYRUM B -b.05/19/1863 -d.10/30/1937