Scenario:
The administrator is not able to view all the booked time off’s for specific period in the Time off Status Report.

Cause:
If the date range specified in the report does not cover the start date of the user’s time off then the report does not display those time off’s
Example:
User has booked a time off from 25th December 2011 to 15th January 2012.
If the administrator runs the report with the date range set as 1st January 2012 to 31st March 2012, then the report would not display this particular timeoff of the user and would only display the time off's which has the Start and End date within 1st January 2012 and 31st March 2012.

Resolution:
Make sure that the user’s time off booking’s Start date and End date fall within the date range specified in the report.