you're seeing the internal actual mapping of the display coming into play
+-----------------------+
|0 -------------------19 |
|40------------------59 |
|20------------------49 |
|60------------------79|
+------------------------+
you're seeing the internal actual mapping of the display coming into play
+-----------------------+
|0 -------------------19 |
|40------------------59 |
|20------------------49 |
|60------------------79|
+------------------------+