There seems to be no rhyme or reason to it anymore. I posted a local question earlier, changed my location to Glenview, IL, where the practice I was asking about it located, selected "local," but I guess it still showed nationally, as I have people from all over answering it.
It used to work perfectly fine.
It's not a big deal for me if I see the national questions, but sometimes when I am searching for questions in my own area, I won't get some that are IN the Chicagoland area, but perhaps a bit outside of the radius. (Ex, someone in the northern Chicago burbs probably doesn't see the Southwest suburbs when they click the tab for their own area.)
I do actually like being able to see posts that would have been local only for the Twin Cities, Madison, Wi, or Milwaukee, Wi, as I have either lived or spent a ton of time in all those cities, and can usually answer some of the questions.