If a new subforum is created, then a post in the Lounge Thread would show as the last thread posted to in both the Parent AND Child forum.

As an example, lets say a Delta Lounge Forum is created as a subforum of the existing Delta Forum. If a post is made within the Lounge Forum, that thread would show in the forum listings for both the Delta Forum and the Delta Lounge forum. I know many people, myself included, who look to the "Last Post" to decide to go into a forum... for activce Lounge threads, that would always show active.

Of course, I many not have cleared anything up with that explanation...