MME upload issue

Hi ,
I'm trying to upload a job to MME, and it is giving me erratic EXIF data, for location and altitude. occasional there's no camera information.
I've manually checked every image and the EXIF data is they're just not being read consistently?
Every time I clear the upload and reload it I'm getting a different result.
I'm going to have to progress the job because it's urgent, nut this is weird!