The auto crop button was found to be on. I have never used that function so was not aware of it's affect.
That would normally be necessary to ensure the image filled the page. Eg. if someone had 4:3 images to print on 6x4" (150x100mm), then crop would need to be on to avoid white spaces at each side.
It's no different to printing to printer, crop on fills the envelope of the specified size but will crop if the image aspect ratio is different from the print ratio.
Terry