Archived Threads are gone

I made a few threads that I then linked to in one of my main channels in an attempt to keep the interface clean, because you can't collapse thread lists. 



However the threads seemed to have archived, and corresponding link to them severed. Now I have no way to get to my threads. 

These were previously linked to all of the threads. 

When I look in the Audit logs, it says they were archived. 


But when I look for the archived threads in the Threads list for the channel, they are not there. 

These threads were hours of work, and I'd hate to have to re-do them. Can anyone help?