Adobe Print Driver - final document size?
I've got a map in Illustrator that I want to print to two A1 pages with a certain amount of bleed and overlap between the pages. I use Adobe Print Driver, which lets me set the Media Size to A1, with the Scaling set to "Tile Full Pages" (see below).

The PDF gets exported just fine, and when I open it up and look under Document Properties, it says the document is 841x594mm (ie, A1 size) and has two pages. Sounds good.
However, the print service is telling us that the document is 832.5 x 594.1 mm, and they’d like us to re-send with the 841x594 dimensions.
So I’m confused. Am I misunderstanding what's going on with the Adobe Print Driver, or is the print service doing something odd? Or Secret Option C, whatever that may be?
Thanks,
Tom
