Quasii,
First, welcome to the forum.
One thing you could to is to use your web browser to visit the RSS feed for the paper. This is the page from which Calibre obtains the news.
For example, look at this page:
http://feeds.theage.com.au/rssheadlines/top.xml
This is the feed for "top stories" for The Age. Whatever you see there, those are the stories that Calibre should download. If the page contains today's news, but Calibre gives you yesterday's, then the fault lies with Calibre. But if Calibre gives you the same news as the page, then you must blame the Age for not updating the feed in a timely way.
I see that the Age says it updates its feeds twice a day, but it doesn't say at what time of the day.
Hope this helps.