Geograph - photograph every grid square

Can anyone clarify, please? I think this NR8744 : Church of Scotland, Pirnmill, Arran is the church marked at the north end of Pirnmill on the OS map at NR 874 447. However this NR8744 : Pirnmill, Church of Scotland is shown with exactly the same grid ref., and is clearly not the same building. On the OS map on the site only one church seems to be shown - but my old 1987 map of Arran shows another church at approx. NR 873 443, near the south end of the village, just north of the PO and the minor road coming down from the hill. It seems to me that this NR8744 : Pirnmill, Church of Scotland is perhaps the southern church, not the one at NR 874 447. Since the photo shows that work is being done on the stone building, I wonder if it is now disused, perhaps being converted to a dwelling? - and what denomination it was previously. Any info gratefully received