Viewing these forums on a mobile device is a relatively new feature, so there aren't any options in the admin panel to change its layout.
I'm not quite sure what you're seeing on your mobile device, but maybe it could be better on a different browser? Also, is there a "classic version" button of some sort at the bottom of the page? That might fix the problem too.
On another note, any suggestions (whether it's for guild or these forums) can be posted in Suggestions. But it's ok since we can move threads around anyway =D