When selecting custom time range, it is not displaying the report within that specific time range. I am available between 3AM and 10AM EST. You may best reach out to me on my email.
The Group Scorecard Trend view shows the number of intervals as chosen in the view (2-8), of the duration chosen for the report.
For example if you choose last 24 hours and, and an interval of 6, it will show you six intervals of 24 hours, starting at the time range specified.
If you choose the last 7 days, it will show you 7-day intervals, etc.