Not so much 'odd' as inconsistent. Just like the Limeys get some of France, those Canucks get US border states:

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but it seems France can't be trusted with any UK tiles:

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However, nor does the lower US get any of Canada or Mexico and we all know the USA is TOTALLY trustworthy:

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Also the Donald would have totally insisted on USA getting Canadian border states if Garmin had had the hide to give bits of CA, AZ, NM & TX to the Mexicans:

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Phew!