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.
Change ownership one or two times, remove monuments and lose records to be able to resell a plot years down the road.
May be difficult to remove all the library books that document cemeteries though.
If the soil is sandy, it does shift a lot, which could be the case in Florida. There was an incident about forty years ago where a retired/almost forgotten cemetery needed to be relocated due to development, and the developer had to basically remove all of the soil to find the coffins due to the shifting due to sandy soil. Some of the coffins were bunched together and all had moved. The cemetery was very near the ocean.
It's complicated by the fact that many less well-off families couldn't afford a monument or grave marker. It might be a bit confusing on Judgment Day.
