Thank you to everyone for your replies! This is very helpful information, and I will be pursuing the additional research for our family. I was very disappointed to realize that my grandfather's grave marker information is partially incorrect, but I do understand that mistakes could have happened in the establishment of the cemetery. It does make me wonder how many others there are? I know it certainly has added to the difficulty in getting information in my amateur research.
My belated thanks to each of you for your efforts to find important servicemember and American history details for families across the country.
Best regards,
Heather Stewart