Hi,
that's because of the 'stereo' support - the tools assume that a square image are two 360x180 images stacked on each other (top-bottom).
The same happens for images with a 4:1 side-aspect, there the tools assume two 360x180 images side-by-side.
In the next release I will couple that detection with the
stereosupport setting. When setting that to false, then such images will be not detected as stereo-images anymore.
Best regards,
Klaus