What does it say under the "Official Scores" tab on the bottom right?
There should be a "Date Taken" and "Date Received" columns. If the AADSAS has received and logged your scores then it should shown when it was uploaded.
Additionally, go to the "Dental School Designations" and click on the goggles to view the PDF application sent to USC. If your DATscores are on the PDF then you definitely should inquire back to USC and try to understand what information they are missing.