Frank explained it to me once, but I still don't make sense of the thread arrangement. Plus when they move a thread from one forum to another, it just vanishes from the original forum.
Because the primitives are too lazy or too inconsiderate or too illiterate to "quote" such as we do here, my fellow alum Skins has it set up so that when a primitive wishes to respond to a particular comment (and not the original topic), the primitive posts immediately below the comment to which the primitive is responding.
It makes a mess sooner or later, because it means comments show up as 1, 2, 3, 9, 25, 4, 5, 7, 6, 23, 24, and so on, as the comments themselves are numbered in chronological order.
If one takes a primitive bonfire and assorts it according to chronological (numerical), one can catch some primitive lies, as the primitives take advantage of the mess to lie about things. But that takes a lot of work, and so I do it only when I'm on to something about the primitives.