Key Figure value in a report

I have a report which is built off an infoset,

When I view the data in the infoset I see the following data

Doc Num Key Figure1

1234 100

1234 100

1234 100

1234 100

In the report the key Figure1 is shown as 100

I have tried to model the same on a cube where Key Figure1 and in the report my Key Figure1 is shown as 400. How can I get it to be 100 as in the info set?

Thanks