The quoted part was copied from concerning submissions as of late.
"For a couple of weeks, Deviantart has been randomly telling group admins the wrong folder to which you are submitting your art to. Because of this, a few submissions have been denied incorrectly. Admins are asked to now check the submission itself before outright denying it, but if you feel that your submission was incorrectly denied, please comment on the notification you get."
Basically, a DA bug has us rejecting submissions that was sent to the right folder but was displayed wrong. If you have been rejected, it's best you try again, as we will examine it closely.