This report's page header has "7 days from" hard-coded in so that it lies about its time period when the user selects an interval that is not seven days.

The page footer gives the correct start and end times, but has a separate problem that the text field is too narrow for the seconds part of these times to render reliably without being cut off.

Reported in commercial support ticket https://mynms.opennms.com/Ticket/Display.html?id=2539