Is this a Pokemon Sun/Moon translation mistake?

[Darwinianevolution]

t3mporary_126 said:
Maybe the translator got confused with the code name having four and pasted it to the sentence that there are four Celesteela. Also, seeing as how all games from every region lets you choose your language, I doubt the Spanish language option or Spanish/Latin local Moon copies gives you 4 instead of two.

I doubt it too. The only reason I can think of for this is that they just assumed that there was the same number of UB2 and UB4. Also weird is the fact that the two celesteeles I caught I did so in the desert, while nothing has appeared on the park. If there are two places, shouldn't there be one in one place and one in another?