Riverside Cemetery entrance

Silas Moffett grave circle #2,
center stone, Silas Moffett
Silas individual ball at 6 o'clock position/west, others in circle, starting with Silas going clockwise
7 o'clock Elizabeth 1841-1904, 8 o'clock Luther F. Lyon 1902-1926, 10 o'clock Marquis 1870-1937, 11 o'clock Alice Hill 1869-1944,3 o'clock Oliver Perry McAuley 1855-1918, 3:30 Face of stone off Ada McAuley 1860-1889 listed in Owen County Cemetery Book, 4 O'clock Cyrus E. McAuley 1882-1886, 5 o'clock Silas McAuley, 5:30 Eliza Ann Moffett
No known reason for Grave Circles, there are several in Riverside. I am trying to find out if there is any significance. If you have any info please contact CardinalLady.