Oops! Yes, those are the 6930 shows. I started the overnight on 6925 after the TCS Unchained Show, so I probably retuned the SDR about then. Regrettably, the chart - although the span can be varied from 1 min to 12 hours - only uses Seconds on the horizontal axis. A UTC time scaling would be a dream, but I am not complaining. The Strength History window in this app is simply one of its most useful features.
I generally leave the USB BW at 2200-2400 Hz for overnight recording.