The application works only with the primary picture from the element “g:image_link”. Check if alternative pictures are not used. In the output feed, look for the element “g:additional_image_link”. If you find it, hide the element – see Mergado instructions here.
These are skipped by the application and left without modification. In case of wrong dimensions, the picture may not appear correctly in the ad. Therefore we recommend setting one general template for all products and placing it at the end. This way you make sure all the pictures are displayed correctly.