You can guarantee that if Irish Graveyard Surveyors have them as two different sites then they are indeed 2 sites. I know Mr Durkan the owner of IGS and he is meticulous in that respect. Often what could be considered as one, which is Old and New, will be treated separately and since much of his work has been what can I say 'stolen' (web scraped) and put on Find A Grave they will be treated as such on find a grave. In this instance from the look of the buildings we are looking at two separate sites. Be aware of two points however. On each of his sites one or more graves are purposefully slightly wrong and the grave numbering system is proprietary and copyright. He gets very upset if it is used elsewhere, as I know to my cost (only in time fortunately).