Reports - Triggers top 100 day/week summaries are identical

Under "Reports"->"Triggers top 100" the "Week" and "Day" options in the combo box display the exact same summary. To replicate:

1. Select "Day" in the combo box and observe the data.
2. Select "Week" in the combo box. Notice that none of the numbers changed (data is identical).
3. Select either "Month" or "Year" to see that the data there is correct.