If we're not finding your current location correctly, you will want to check that your Location Services are enabled on your device and that MapQuest has permission to use them.
To do this, simply go to your device's Settings, choose Privacy, then Location Services. From here, you'll want to make sure that Location Services are ON for both your device and MapQuest.
Tips and Tricks: To learn more about iOS location settings, including instructions for older versions of iOS, please feel free to read through this help article.