Hi Jennifer,
You need to crop that grey edge out and re-upload that image -
You should also set your phone , camera or scanner to the largest image - your image can only print a 12 x 9 and will not work on other larger products.
If you sell an image FAA will refuse to print it if the image shows.......
Pixellation
Blockiness
Noise
Bad cropping
Blurriness not in keeping with the image (ie not meant to be there)
normal font signature (Arial, Times New Roman etc)
signature cropped half off the image
large watermarks
noticeable camera flash
Upsized images
FAA does not do quality control until you sell so, it is your responsibility to quality control your images carefully before uploading. You do this by zooming in using a photo editor to 100% and then carefully going over the image, checking for the above defects
Read this thread for original art copying techniques https://fineartamerica.com/showmessages.php?messageid=2764654