In a tree view list, it is possible to change the selected item by using the up/down keys on the keyboard.

OBS:
If the selected item is a the top of the visible items, and the up key is pressed, the displayed items move up by one line. The selected item changes to a new item, but remains as the the topmost visible item.
If the selected item is a the bottom of the visible items, and the down key is pressed, the displayed items move down by one page. The selected item does not change, but it becomes the topmost visible items.

EXP:
Consistent behaviour. Both should either change the view by one line, or one page.
The current up key behaviour (changes selected item, and scroll list by one line) is preferred, as this is the way normal listboxes and editbox fields behave in the same situation (and almost all other programs, eg Notepad, Chrome)