Hi Roy,
For some reason I get the image size reduced from 9 x 12 to 9 11.25 inches, and all the border margins, images and sizes are screwed up.
The overall print size with the 2 x 0.75" border will be 15x12".
I think I've spotted the problem from your screen shots - you have not put a dot in the spot for Auto Crop ON. Without this your print will be the same aspect ratio as the image rather than that of the specified print size.
See my screen shots below.
I have made the outer border coloured so it is easier to see. The second screen shot is from the Page Editor size tab.
Terry