Thanks for reporting!
As you have seen the DST switching now, I assume you are in the US or Canada? I have still two weeks until it gets triggered for me 
That might really be something we have to live with, as - as you already pointed out - it does not disturb too much and I have no idea how to actually do anything ybout it - because what you see is what actually happens - your local time jump and hence there is one hour that exists twice in the log.
It could easily be solved if we would show the graph with respect to UTC (no DST switching), but I'm fairly sure that most people want to see local time.