If you google it, you'll see there are 193 to 206 countries in the world, depending on the definition. This is nowhere near the 236 figure of WTS. They use another word, their own word, so they can count as many as they want, according to their own definition. If they used "countries", they'd have to conform to one of the definitions of the word "country", which would narrow their count to 206 maximum, minus the banned ones. Now, with lands, they count territories which are not considered countries by the world, but hey, who cares what the 'worldly' world considers?
As with almost everything else, the WT use their own vocabulary. And when you 'invent' a word, you give that word whatever meaning you want, which in turn gives you power to those using your word. Orwell in "1984" explained thoroughly this characteristic of totalitarian thought and practice. That's why we call that practice of WTS, and WT organization itself, an "Orwellian" one.