The lighting for most of this area was very dynamic during the time of your collection. This caused your camera's white balance and exposure to vary a lot which made matching features much harder than it usually is.
Also... The Mavic Air works but really isn't a quality camera for mapping purposes. You can use it but you need to use more overlap than you would with most other cameras to make up for the lack of image quality.
If you are going to be mapping anything professionally I would recommend getting something more appropriate for the task.