Steps:-
1] Considered an existing enrollment effective from 01/01/2008 to NULL for an EE for Basic Life and AD&D plan.
2] Generated an Invoice for June 2016. On this generated report searched for the above EE and observed the below :-

Actual result:-

For the billing details sections blank data is displayed for the Basic Life and AD&D enrollment. For the adjustment details section the data is displayed properly as far as retro enrollment is considered.

Expected Result:-

For the billing details sections blank data should not be displayed for the Basic Life and AD&D enrollment. It should display the data which is displayed in the Adjustment section.

Please find attached screen shot