Image upload with min and max resolutions set can result in only applying the max resolution

If I set the minimum resolution on an image field to be 800px x 250px and set the maximum resolution to 800px x 250px as well, it would seem that this should force the image being uploaded to be 800px x 250px, no more no less. The image field, in fact, states that the image must be exactly 800px x 250px. However, when I upload an image that is 900px x 500px, the image will be resized ONLY to the maximum resolution. The image would then be 450px x 250px, thus failing to meet the minimum width of 800px.