How can I make a date appear on the group line?

Attached is a report where I am trying to capture all employees active during a date range, plus those employees who had or not a medical benefit during a date range.  The active employees date range is 1/1/2015 to 12/31/2015.  The benefit date range is 4/1/2014 to 12/31/2015 or active date = 12/31/2049.  The unfortunate part is I am trying to capture active benefits during a date range of 1/1/2015 to 12/31/2015, but the employee could have an active benefit from 4/1/2014 to 3/31/2015, and the report wants to see their start date as 1/1/2015 (Start Date 2). With a Calc,Display and Reset on the employee# grouping and a suppression on the Detail line I have captured most of what I need.  But the Start Date 2 formula field I cannot seem to get it to appear on the group footer line as 1/1/2015 or the actual start date of an employee who started during the current year.  I hope I have explained this clearly.  Please advise.
WORXTIME_WRPI_Coverage-Upload_Sample.rpt