So let me try and get this straight. You are saying that the cursor moves vertically, but when it hits the bottom of the view the text doesn't scroll up?
In fact. It goes down, counter shows me that cursor continues to move down, but text is not scrolled. if text is scrolled with vertical scrollbar from its first loaded position to a new position (for example the first line is not visible anymore) then if I move cursor with keyboard down text is scrolled down, or up if I goes up with up arrow button. If I go again to the first line with cursor (and so text is showed as when it was loaded) and I go again down with cursor, then we have the same problem again(cursor doesn't scroll down).
Moving it vertically using the keyboard works here. But when moving it horizontally so that it jumps from the end of a line to the start of another does not scroll the text vertically, the cursor just keeps moving on outsize the viewing area.
Though it's a bit unusual that the cursor does not move all the way up or down the page before scrolling starts. (keyboard arrow up/down)
That's what the "Lookahead" value is for. If you don't like that, and want the cursor to go all the way to the bottom before scrolling the test, set it to ZERO. Without any lookahead does make it difficult to see the text is that coming into view though. Personal preference is a strange thing :)
Same here. Test case: Type "Ctrl-Down", the cursor is moved to the bottom of the source file because you can see the status bar saying "Line: 999" but the source display is not updated.
You can still continue to move the cursor with "Cursor-Up" and the "Line/Column" values in the status bar reflect the changes but the source is still not moved to the cursor position.