Thank you for the suggestion but that is all set up correctly.

Also: If that were incorrect, I would assume that it would have trouble printing towards the end of the plate, not at the front (as it would be limited in the maximum Y-axis).
Like I said: when I look at the coordinates on the printer display, they show correctly and I can move the print head via the printer controls to every position on the print bed.

I would think that either something gets screwed up in the Gcode or the firmware is somehow wrong (but how do I check)?