In order to change rules for autocomplete you need to go to wpresidence\js\google_js\ google_map_submit and change the levels as per your needs

All details on Google geocoding can be found here:

This is helpful for the clients that use Google autocomplete feature and the input from Google is not accurate, for example,the city is saved as area.

If this is general situation, you can use POEDIT to change the labels from area to city.  This will it be applicable if the situation happens for only one city.