Do you want it to be more accurate? If you havn't alredy, https://www.warlight.net/ChangeSockets
Oh, and yeah this happens 'occasionally' since only some things, like opening a game, making orders, etc. counts for the last seen time. So if you have been browsing forum thread, then yes it happens. (I think)
Besides "Statistics on this page can be up to 30 minutes out of date"
PS, now "Last seen 29 minutes ago "
Edited 6/24/2016 09:06:30