Tweak the "Download Steps" setting in the "Manage Repositories" dialog. That variable determines which zoom levels are actually downloaded automatically. This can save disk space. ("View Steps" determines which zoom levels to actually display. If "View Steps" is less than "Download Steps", then for some zoom levels, you will see pixelated versions of higher zoom levels.) Alternatively, you can download the maps manually using the "Manage Maps" dialog. Manually downloaded maps are not subject to the "Download Steps" variable.
The concept is called "Auto-Rotate" in Maemo Mapper and is enabled via the "View | Rotate | Auto-Rotate" menu item. It only works when "Auto-Center" is enabled. Otherwise, you can always rotate the view manually.
Maemo Mapper cannot read the proprietary map format of Maps/Wayfinder, so that isn't the problem.