For some reason it isn’t creating the correct URL for the boards. Once there is a topic under the board, the title becomes a link, but it takes me to a 404 page. This is the same for the link including in the breadcrumbs.
Is there a way to edit this URL directly?
It might be a permalinks thing. Just go to Settings > Permalinks and come back out. That should have fixed it.
Awesome, that worked.
Next question. Is there a way to keep my blog sidebar from showing up the the pages created for boards/topics?
That's a theme thing really. Maybe you need to edit the menu and/or widgets in your sidebar?