To me, the meaning of "Needs more focus" is rather different from the explanatory text "The question currently includes multiple questions in one. It should focus on one problem only."If the point of that option is to state that there are too many questions, then the bold text could make that clearer at first glance - something like
Asks multiple questions
The question currently includes multiple questions which would be better asked separately.
Looking at the explanations, a question that 'needs focus' but doesn't actually contain multiple questions (which is a common problem) should probably instead be marked as "Needs details or clarity".
EDIT: from one of the comments below, apparently "Needs focus" is basically supposed to mean the same thing as "too broad". In that case, the problem is with the "The question currently includes multiple questions in one" explanatory text. It's very common for something that's a single question to still be too broad. If someone asks "How do I make a website?", that's not multiple questions, but it is too broad. (It might still be fair to say that it could be split into multiple questions, but not that it currently includes multiple questions in one).