I just checked and they're not open to accept any deviations from members. You have to go into the members on your admin page and go to All folders and change the settings to approve all submissions in each folder or no one will be able to submit to the other folders but the feature one.
You see them all as open because you're the founder, that's automatic for you. The members can't see the submission sign on the galleries to submit.
Also, can we have a gallery folder for MDTAS?