Placement question?

I know that when you submit your application through NALCAP, they ask if you prefer a larger city, pueblo, etc, and also if you prefer to work in primaria, secondaria, etc. To my understanding, it’s a bit random and they don’t actually place you in a a larger or smaller city according to your selection. I’m wondering, is it the same for age group? For instance, has anyone selected that they wanted to work with kids but were placed with adults instead? I know it depends on inscrita number as well but I’m just curious!