What is the reason for this many 'subtownlands' suddenly appearing and being this close together, are they accurate?

Excuse my ignorance if these are the various territory names here but I've never come across any of them in all my times in Fanad, nor can get my head around the name changes so close together.

I'm baffled from seeing several duplicating the same name, some having 'island' with no water to be seen anywhere and some, like 'illanroenapora' don't even look Irish.

Is this police station closed?

The Gateside Development is missing from the Map. Gateside manor, Park, Avenue.

Possible narrow gauge railway near here.

Car parks, shops and post office marked in what appears to be a housing estate

No longer "charlys restaurant" is now named "the Hen House"