Don't use the DJI app to transfer the images around since it messes with the tags. Just upload the images directly from the SD card to make sure the tags don't get modified and it will work fine.
You could also try using a different browser since some browsers won't let the the site inspect the tags before upload.
If you continue to have issues please email us a sample file that isn't working to mapping@dronesmadeeasy.com so we can take a look.