Printing correct Autocad format size?

we have trouble printing pdf from Autocad definded layout – it always changes the predefined format (A4) to something else (reduces the size).

This is how the Layout (named “Format A4” in Autocad is set up:

This is how I load it to the InterPlot Organizer:

And this is how the “properties” dialogue looks like:

According to this I would think the generated PDF should have A4 format size (297*210mm). But when I generate the PDG with those settings, the final file is smaller (see the dimensions):

How do I set the Interplot organizer to generate the exact size of the layout?