WEIRD PING!........................
Lots of these old cemeteries have really poor records. Often it will be a family plot of say 16’ x 16’ but only two people buried there. After a period of time (20 years??) of no activity the cemetery can sell the remaining burial sites in that plot. But the actual location of the two people buried in that plot might just be a guess.
My sister worked at a cemetery and the digger was always coming across old bones. My sister said “the ground shifts a lot”. She was probably told that and believes it. No - they just have poor records.