Norton Mobile Security for iPad

Why does the Norton Mobile Security Lost Phone Finder app take up another license in the Norton Security with Backup subscription for the same iPad if I reinstall the app after factory resetting the iPad.  If I delete and then reinstall the app without factory resetting the iPad it reactivates the app but does not take up another license but if I factory reset the iPad and then reinstall the app it does take up another license even if I delete the app beforehand.  The only way to avoid this is to delete the iPad from the Norton Mobile Security web portal every time I factory reset the iPad.  Can the same thing happen with Android devices if the Android device is factory reset?  I don't have Android.