Tested with both AF 6.2 alpha 2 and the 6.1 stable.
When AF is disabled, forum lists and posts appear normally between my two sidebars (I've got blocks in both).
But using AF, lists and posts want to appear below the last block in the right sidebar (sidebar-last)

Tweaking CSS, I've been able to get the main forum list to appear up between the sidebars. But no luck yet w/nodes.
Anybody got any suggestions on how to get that working right?
No doubt, has something to do w/the fact that the node is coming from AF and is preprocessed by AF... but I can't see anything that would explain why it wants to go below the sidebar.

Good example of what I mean here: http://test.sharperiron.org/forum/thread-fantasy-football-season-startin...