Homerun?

[canadaump6]

I don't understand why they call it a homerun if a ball hits the top of the outfield wall, and bounces into the stands. 6.09d:
A fair ball passes over a fence or into the stands at a distance from home base of 250 feet or more. Such hit entitles the batter to a home run when he shall have touched all bases legally. A fair fly ball that passes out of the playing field at a point less than 250 feet from home base shall entitle the batter to advance to second base only;

But then there is 6.09 g:Any bounding fair ball is deflected by the fielder into the stands, or over or under a fence on fair or foul territory, in which case the batter and all runners shall be entitled to advance two bases

Neither rule really covers what to call when a ball hits the top of the outfield fence. Heck there was a ball hit in Seattle a few years ago that actually hit the outfield wall and bounced over the fence without touching the ground. What would the call be on that?

Bear in mind that I am posting this thread to seek explanations and not criticism. If you feel the need to come at me with a personal attack or a flame like you did in the "Batter Not Ready" thread, at least do so via private messaging.