@ckoei – that’s a feature not a bug – the feeds on the front page are cached to save them having to be reloaded every time someone visits – thus saving wear and tear on the server.
I guessed that most people come and have a look at the site at most once a day or so or every couple of days, so it should give most people an overview of what’s going on. The activity tab is – as always – the place for your latest Shoot Up fix!