So I was having trouble printing some GBA covers from the site. Specifically Breath of Fire2, Wade Hixton's Counter Punch, Karnaaj Rally, Onimusha Tactis, Pocky and Rocky, Shining Soul2. I think I figured out why these were printing too big on legal paper. When I opened Wade Hixton's Counter Punch in paint.net I checked the pixel size via the image button on the toolbar under resize. I found the pixel size to be correct, but the print size width and height was different from the other GBA cover images that were printing correctly.
Cover that printed correctly.
Width 10.87
Height 4.57
Cover that printed wrong.
Width 9.31
Height 3.91
I adjusted the width and height to match the correct width and height in paint.net and saved the image and was able to print the images at the correct size. I hope this helps others.
Take care.