Benefit Plan setup - Start Enrollment Date

 I've been testing the Start Enrollment Date options (BGPP - DeductionInNextPayPeriod) on the Benefit Plan Master.  (E1 - 9.0)

I have a plan with the value set to 'Beginning of Pay Period', and the Enrollment Date is then set to the first of next month (example, 9/1/10).

When I create an INterim check for the biweekly pay period ending 9/4/10, I expect to see the entire amount of the DBA associated with the plan calculated. Instead, I am seeing the DBA prorated, and calcuated only for the days 9/1 to 9/4 (4 days of the 14 day pay period).

I am testing this with Company Paid Life Insurance, STD and LTD,  which all have Calculation Tables behind them.