The last visit time does not seem to be maintained correctly in the session. It seems to be updated to user's current login start time instead of when user last visited.
I had taken a first stab at this (which you can find in SVN), but it doesn't yet do what I want it to do. So, more work is needed, which I may get around to in the next few weeks.
Ping & Net - my free Android app for TCP/IP network diagnostics
I think it's fixed. You can grab the source code from SVN to build it now, or wait for the upcoming 2.8.1 release - which should happen within the next few weeks.
Ping & Net - my free Android app for TCP/IP network diagnostics