aghadowey
The red circle on multimap should on your screen be superimposed on the OS 1:50,000 map (displayed at 1:25,000), showing the topography of the area, and the Irish Grid. That is what I see when I use the multimap link.
In the info you have listed there appear to be only three graveyards, as confirmed by E Caldwell's experience on site. Mapref 678313 in one of the lists would appear to be the same as mapref 67783140 in your other list. The Historic Monuments list does not identify any graveyard - its descriptions are a little confusing: the first site appears to be the CofI church, though referred to as a site; the second site appears to be the old church, and St Aidans RC.