Could just be a bad reviewer. When I have photos rejected, I'll look them over and if I think the rejection is bunk, I reupload. Usually they get accepted the second time around.
I never tried reuploading anything to FT. You can't delete the rejected files so wouldn't they know that it was already rejected?
I had some strange rejections lately too, this week. Two images from the same session but different, one accepted, the other rejected for "Similar file already submitted", meaning that one of them is enough.
Though, there are contributors with pages of almost identical photos.
Also two floral backgrounds rejected for "Lack of aesthetic or commercial appeal". Aesthetic appeal? This sounds like: I don't like your haircut.