Problem with Weekly Timesheet view

Problem with Weekly Timesheet view

If you notice in the attached screenshot showing the times reported by my team, times for September 24th are missing even though it says it is a weekly view showing last week (September 24, 2012 to September 30, 2012). So even though time sheet inputs for 5 days should be displayed, only 4 days are displayed! 

To display time submitted by my team for September 24th, I have to go to the "Last Month" view and manually add up times for those five days.

Am I missing something? Any ideas?