Workflows generated by the system, such as ones triggered by scheduled events, can be difficult to monitor in the Administrator Console since they do not have a user name associated with them. If you run the following SQL against the tririga schema, these events will now show that they are owned by "Crazy User" and can be viewed in any of the Workflow Event Queue Statistics options.
INSERT INTO user_credentials
(user_id, company_id, user_account, admin_console_permissions)
(0, 208133, 'Crazy User', 0);