From Online Manual
Revision as of 10:18, 17 January 2014 by AngelinaBelle (de-obfuscated last sentence. But is this correct? parent board stats updated with child but not with grandchild?)
Child boards are shown directly under their parents in places such as the search page and the jump to boxes.
Parent board statistics (number of posts, last post) are not affected by the posts in grandchild boards.