Image not marked as AI even after selecting the box

I am uploading exclusively AI images, and I always mark them as such (Select all -> Mark as Generative AI, and check that People are fictional). Before submitting, I also go through each image to check category/title/keywords, and these boxes are checked. Now, my acceptance is slow and more around 50/50, but I keep checking on my images. 

Once they are accepted I do a quick look-around and notice that sometimes, accepted images are NOT marked as AI. I delete those, as I am yet to find an option to mark them as AI post acceptance. I guess it makes sense to not be able to do this, as it was accepted as a real photo (it would be worse if the other way worked, pass it off as AI and then uncheck that).  But still - I have seen the boxes checked, I made sure to check them, and yet this still happens. If I could even see it in the review stages, I could fix it, but nope, only after they are accepted. And if I reup them, I risk them not getting accepted again... 

Any information regarding how/why this happens is appreciated.