Difference (doubled) in report painter.

Hi,

I am using report painter to generate reports. However, I found there is a row of data doubled as the orginal. E.g. the entered data is "20", it will show up as "40". From the advice gained from my superviour, he said it may be a problem about SAP report painter and may be able to find solution online. However, I can't reach the solution on the internet. Can anybody help me on this issue? or anybody have face this issue too? How can you solve this problem?

Thanks!!!

Regards,

Mandy