> Islands which are also states say the name of the island twice at certain zoom levels.
That seems correct and desirable? They're two distinct things that happen to coincide. Just like a street with a name might also be part (or the entirety) of a numbered route, and we'd want the map to show both.
That seems correct in theory but it is inconsistent between islands - I suspect it's to do with adminstrative levels differing between different nations.
e.g. With the first example - Isle of Man - you won't see the same happen with either Great Britain or Ireland, nor with smaller adjacent islands. The labels font-sizes & zoom behaviour are also very different between Northern Ireland and Ireland - the UK having countries within a country and adding an extra admin level in the hierarchy. Isle of Man being a crown dependency could be a factor I guess, or something similar.
Ultimately this seems fine to me though: representing areas locally for each locality is by definition inconsistent.
That seems correct and desirable? They're two distinct things that happen to coincide. Just like a street with a name might also be part (or the entirety) of a numbered route, and we'd want the map to show both.