If you have set your layout to DoublePass = true then make the following check:
- Set the Property AlignBottom of the DocumentFooter Databand to false
- Set the Document to DoublePass = false and Print it out
- Set it back to DoublePass = true and Print it out
- Compare the two outputs and find where they differs.
!! -> It's important that the rendering height in 1st and 2nd Pass is the same!!