Here is how it works...
If you are staying on property, you can book ADRs at 180 + 10. This means that starting 180 days from the first day of your reservation (in your case 9/29) you can make reservations for that night, plus each additional night of your trip (up to 10 nights). So if you are staying a week, you can make reservations for the entire week beginning at your 180 day mark.
Previously, you could only make ADRs exactly 180 days in advance. So you had to call every day to make reservations for the next day of your trip (assuming you wanted to make each at the 180 day mark). This allows you to save all the extra phone calls.
This only works for Disney resort guests. Other folks still have to do the traditional 180 day rule.
Does that make sense?