In order to be non-destructive to teacher learning materials we wanted to ensure that if you use Socialwall with Moodle that if you decide you want to switch to a traditional Topic/Weekly format at a later date that you would not lose all your materials.
To accomplish this the folks at Synergy learning devised a way to utilize the topic format structure to that all items added to a Socialwall Course would appear in topic 1 if course formats are switched.
This is a safeguard for teachers and their content.