All Records: all records that are assigned to the custodian, regardless of status.
Assigned: records that have been assigned to the custodian but have not been marked as in progress. 
In Progress: records that have been marked in progress by the custodian but have not been completed.

Overdue: records that the due date has passed. The due date is highlighted in red.

Messages/Issues: records that the requestor has sent you a message or indicated there is something wrong with the request. The requests also have a red flag in the first column.

Pending Shipment: mail delivery records that have been paid for but have not been mailed out yet.

