Simplemarket - header image being cropped too small

Hi,

I have just started using the Simplemarket theme and having trouble adding a header image.

In the header admin section, it states that an image sized at 1102 x 350 will fit, however, I am trying to add an image that is smaller [1001 x 100] and yet, when I proceed with the upload etc, the cropping section will only allow less than half the width.

Am I missing something here?

Any help would be hugely appreciated.