I think that if forum has child forums it's topic count should include child forums topic counts. For example:
Forum1 4 topics
Forum1ChildForum1 1 topic
Forum1ChildForum1Topic1
Forum1ChildForum2 2 topics
Forum1ChildForum2Topic1
Forum1ChildForum2Topic2
Forum1Topic1
P.S. The same with post count.
Thanks.
In SMF 1.1:
Admin -> Boards -> Settings
"Count child's posts in parent's totals"
Thanks! :) And sorry for my inattention...