AP expense report 11i

 HI Experts,

I have an expense report way back submitted by user in 2012 November. This was pending with system administrator. Now, this report in ap expense report headers all table is showing total amount as zero. When I checked the ap expense report lines all table, there are 4 lines with amounts with total of 160 dollars. This total is missing on headers table. How come. What should I check. There is no data available on the WF side and this report is not available in the user page as well.

Under which situations can the total amount show as zero in the header table where as the lines tables has the amounts.