My charts for last hour are broken, here’s how they look like:
I agree that our attempts at modern art could have been better executed. While we slept an extra hour, our software double-recorded stats for that hour. I can think of better ways to display 2 hours’ data in one timeslot, but fortunately we only have to live with this once a year.
We’ve got a bug filed on this, and while it will look funky for the next week or so until the fine-grained data gets re-aggregated, both sets of data are “true” and you can differentiate them by hovering over a timeslice in the graph, and the tooltip that pops up will identify which line belongs to which hour.