Hi,
According to me as the posting date is 01.03.2015 the same would be the Asset Value Date. As the Postign date and value date cannot be in different fiscal years. Now from Asset value date the depreciation posting is started. So system had posted the differential amount of Depreciation of new addition in asset from the 01.03.2015. So 2 lines are displayed for the same.
Regards,
Malhar.