See..
I expected that to look like
test
................test2
................test3
................................test4
................................test5
That's the tree obviously, which can be seen in all 3 display modes. In Topic mode, if I click on any of those posts, they are displayed in chronological order, which is good.
I just don't know why the tree stays in reverse chrono order. There's a thread option for that and it doesn't seem to affect posts within the tree.