Mavic Pro Drone AEB Trouble

So on my last flight, I imported my images and then batch bracketed them in Photomatix. Photomatix had a hard time correctly combining them and I had to do them individually. As I was going through the files, I noticed that the settings on multiple images were exactly the same and same exposure.

What Would cause the drone AEB to take bracket the same exposure twice? I Know DSLRs will do it when its bright outside and the shutter speed is maxed out but this wasn't the case with the drone.

Today I did a flight and currently, everything looks like it went as should with the images.