What I always disliked about the PPO's, is that if you look closely you'll see that the timer on the PPO page refreshes every 40 seconds. So, from the moment you see the count down clock, you know when the PPO for you is actually going to start. What I'm saying is that when the clock on the streamline page for instance shows 09:59:40, the PPO page will not show the slightest inclination of turning into the order page until 40 seconds later, which then is 20 seconds AFTER the official PPO time. So I guess that the order page is not available for everybody at the same time, which gives some people a head start of course. I think it becomes available to everybody within a 40 second window though. But on days like today, every second counts. Keep an eye on that during the next PPO.
It's something I have noticed on several PPO's. Either that, or the clock on SSC's streamline page and the one on my CPU are horribly out of sync.