This will have to wait for a restructuring of the reports internal data. Right now, the hierarchy is lost along the way. It is on our todo list to fix this.

I'd like to add my request for this as well. It would be better for me if I could simply enter a toggle state on each account to say lump all sub-accounts into a total for this category. That way you could arbitrarily drill down in a few spots if you wanted and hide other details that you rarely wanted to see. But if that was beyond the pale of reason, a second level (or third level) would be a good compromise. Top level alone really doesn't do it.