Hi Jim,
I am excited you are willing to help out and add data for the map!
In this case, Boissevain-Morton, Manitoba, Cemeteries is a grouping of cemeteries in Boissevain-Morton, Manitoba, not an actual cemetery.
Once there is an individual cemetery created (i.e., Boissevain and Morton Cemetery) and the coordinates are provided, we can then show it on the map.
As an example, see the edit page for Sterling-White Cemetery, Highlands, Texas. The CategoryInfoBox Cemetery template is being used to document the needed data, such as Name, Parent, Location, Coordinates, FindAGrave link, etc.