As far as I know, South Africa and Finland do not have overseas Territories. You are also missing Chile (Easter Island), Spain (Ceuta), Ecuador (Galapagos Islands), Colombia (San Andres), and India (Andaman Islands)
I made a quiz like this a week ago if you want to see if im wrong but im just putting my observations.
It isn't about distance, its about if how the territory is governed in contrast to the mainland. Puerto Rico for example, is a territory of the US, but unlike the 50 states, they do not have representatives (They don't get a choice in the matter). Same for Guam, and other US territories. Although every country is different, that is basically how it works.
I made a quiz like this a week ago if you want to see if im wrong but im just putting my observations.
https://www.jetpunk.com/user-quizzes/1464954/countries-with-overseas-territoriesdependencies