I'm not sure why, but some of my art has been marked as adult despite it not being sexual. They contain mild nudity, but the nudity is not sexual and aren't the centre of the pieces, anyways. Sorry about that, I'm not sure how to fix it because when I go to change it back to M for mature it says it's locked as Adult.
Gekkotsuki
I'm not really sure if this is that way, but if it doesn't let you change the rating label of your submission, then that must mean it's been manually changed by a Moderator already.
Also, "mild nudity"... One submission contains a character showing their chest, and the other contains a character with their genitalia out. There's no "mild nudity" point - even if it's not in a sexual manner, genitalia-showing/nudity is always a safe bet for marking your submission(s) as "A"(dult) rated content.
tosok
Why is there an option for "mild nudity" that marks it as M? How would you define "mild nudity"? My previous understanding of mild nudity was artistic nudity that isn't fetish/sexual, which is exactly what these pieces are.