The issue here has to do with the the data coming from Jaiku.
Currently we're pulling the RSS feeds (they have a richer API that we
aren't currently using). When we can't figure out the actual date of
the event from the RSS, we use the timestamp from when we received it.
We check for new content about every hour, currently.
When I'm adding the API hooks to reply back to Jaiku, I'll see if I
can't fix this, too.