If your photo was taken with iPhone live the picture will not crop correctly, you must turn Live off before uploading.
Steps to crop image:
1. Click the upload button above and choose your picture.
2. Crop your image by dragging the bar that appears below the picture above. Size your image to fit within the parameters of the white box. Place the cursor on top of the picture and move around to crop accordingly.
3. Click the CROP button to complete.