It seems to be totally out of whack, but I can't remember if it started with F5.
When I started, there were live updates on the stats graph, whenever you got a sale.
Then it went to once a day, then to twice a day, once early in the morning UK time, once mid-late morning.
Now it's late evening UK time, but it doesn't seem that everyone's update comes at the same time. Someone here, on another thread here, a few hours ago, said their chart had updated to show yesterday's figures; as of this moment, my figures from yesterday aren't showing on the stats page.
It's odd how they can't now do what they once could do perfectly well.