I've noticed that the timezone that K2 articles are posted in are different from those posted by Joomla's own article system.

For example I have my System config set to +10 (East Australia). When I posted at 7.30am this morning, my article showed up at 21:30 yesterday. Yet when I post from Joomla core, the time is correct for my timezone.

Why would K2 use a different time setting?

More importantly, how would I fix it?