ROS 6.17, MIPSBE devices.
I have found an inconsistency between last-seen property display in CLI and Winbox.
CLI displays in weeks and days and time, but Winbox displays value like “49638d 09:30:37”.
I checked the documentation, but this poperty is not documented!
(http://wiki.mikrotik.com/wiki/Manual:IP/DHCP_Server#Properties)
Sent e-mail to Support, [Ticket#2014072866000198].