Hi Don,
Here's what I got back from Craig, our senior web designer:
You can’t choose what threads appear in which column. The system decides that. Each column defines what type of threads get displayed. Below is a short description of each tab.
All Recent
All recent active topics in order from newest to oldest.
Unanswered
Threads that no one has responded to.
Unread
Threads that the system has indicated the logged in user has not viewed yet.
Your Discussions
Discussions that the user has participated in.
Does that help?
Tim