You may notice that even after you set your location to a specific city and proximity, you will see ads for jobs or resumes that are located in other cities, sometimes even in different states or countries. This occurs because of the "All locations" feature. Posters can specify to have their listings posted to all cities, regardless of the actual location.
If this disturbs your browsing because you want to look in a specific area only, you can easily browse items in your area only by changing the sort option to "Distance". This will sort the listings so that items and properties that are physically close to your location will show first, before the all location listings.
(Note: This will still show the all locations top listings before the local free listings.)