As far as I understand you got up until 15 October to complete the project (a little extension for us). Its really needed in my case.
I have just finished ass 3 now. Some of the questions are a real head banger! The project counts 40% towards our year mark. If you put alot of evert into ass 4, it will definitely help to push up the year mark (like in my case!)
I checked with the lecturer. The due date is the 15 October.
Apparently there is some limitation in the myUnisa configuration that makes it impossible to set up a due date later than the 30th September, so the lecturer was forced to set up myUnisa like this.
But nevertheless the due date is the 15 October (today)