This question is locked. New answers and comments are not allowed.
Depending on the number of items at the end of the list, you can often see the previous sticky header For instance in your sample application, the phone book allows you to select Sticky Header and depending on the number of items at the end of the list, you occasionally see the previous header.
For example, if you add "Xander Guthrie2" and "Xander Guthrie3" to the Contacts.txt file and then scroll the phonebook sample to the bottom of the list slowly past W to X, you will see a point at which the W should be an X as it is covering the X below entirely.
For example, if you add "Xander Guthrie2" and "Xander Guthrie3" to the Contacts.txt file and then scroll the phonebook sample to the bottom of the list slowly past W to X, you will see a point at which the W should be an X as it is covering the X below entirely.