My Problem: Document Management works for some entities, but not others.
I've installed the SharePoint 2013 List Component. It is activated.
The 'Document Management' works fine for Accounts and Contacts. I can successfully upload documents. See screenshot:

If I try 'Opportunities' or 'Leads' the Document Management is not working. See Screenshot:

I've double checked if 'Document Management' has been enabled. It has...

I've ensured these entities are checked in the 'Document Management Settings'

I've confirmed that the List Component has created the folders (Note Account has been renamed 'Household' in our organization's case).

Am I missing something?
I can't seem to figure out why the 'Documents' tab isn't showing up in Opportunities, Leads etc, but it IS showing in in Accounts and Contacts.
Note: Our organization uses CRM 2011 online, and SharePoint 2013 (Office 365)