It's likely an automated response. Some schools will receive notice that you selected them once you e-submit whether your GPA is calculated or not, whether all your LOEs are complete or not, etc. Once your GPA is verified, your app with them will be marked complete on their end. As for "mailing out" status on ADEA AADSAS, that isn't completely accurate. First of all, things aren't physically mailed... schools login and see applications online just like we login and fill them out. My application status didn't change to mail out for quite a while but 5-6 schools had already contacted me by email. Fill out the supplementary apps as you're instructed but don't stress! There's nothing wrong with your apps 🙂