Yes, that's not well put. What I understand is you have to meet all the conditions listed. So, if you list down the conditions for 261313 on the main page and additional information page:
- Provisional 489 visa only
- 70 points required
- Not available for high points nomination
- Not available for chain migration nomination
- Special Conditions Apply (any of the following)
- International graduate of South Australia
- Worked in a skilled occupation in South Australia for the last 12 months
- Have an immediate family member permanently residing in South Australia for 24 months or more
- have high points (80 points)
Now, think of who can meet all the criteria
- Subclass 190 ---- DOES NOT MEET (1)
- Subclass 489, international graduate of SA, 70 points ---- MEETS ALL CRITERIA
- Subclass 489, offshore applicant, 80 points ---- DOES NOT MEET (3)
So, you fall under category 3 above.