Aside from the ones that took something that was correct and turned it into something blatantly wrong, you do raise an interesting point. However, I'd maintain

Aside from the ones that took something that was correct and turned it into something blatantly wrong, you do raise an interesting point. However, I'd maintain that if you end up with linguistic inconsistencies and it's affecting your bottom line, then that's "worse" in my book. I've learned that it must be made clear to the translator exactly what the target audience expects (I've had to tell British translators to use U.S. spellings, mainland Chinese to use terminology that's specific to Taiwan, etc.). The most experienced ones know of these distinctions and make sure to observe them. The ones who don't (or can't) are better reserved for the jobs that are matched with their background.