Wingman reported this:
https://community.sophos.com/products/unified-threat-management/astaroorg/f/53/t/32737
In reporting, wherever you can enter custom dates, the system allows you to specify, for example, "From: 2010-02-07 - To: 2009-12-07." That results in nothing found.
The system should not allow the entry of an earlier date in the To: field.
Cheers - Bob