There is a bug in the file:
Linux - /usr/local/open-audit/code_igniter/application/models/m_device.php
Windows - c:\xampplite\open-audit\code_igniter\application\models\m_device.php
Please add the below at line 1094 onwards to rectify this issue.
This bug causes new devices to have a "first seen" attribute value of 2001-01-01 00:00:00 and hence they will not appear in the Devices Discovered X reports.
Apologies for any inconvienence caused.
This has been rectified for our next release.