If you booked one of the onsite hotels:
Go to
www.universalorlando.com
Click on HOT DEALS at the top of the screen
Choose your hotel and click on BOOK NOW
Enter your dates.
If the Stay More Save More discount is available, it will say Stay More Save More starting at $_____
The Stay More Save More discount might not be available for all rooms.
For example, at the Royal Pacific Resort, the cheapest room is Standard 2 Queen.
Maybe for your dates the Stay More Save More is sold out for the Standard 2 Queen but is available on the more expensive King Suite.
In that case, it would say:
Seasonal Rate starting at $269 (which would be the Standard 2 Queen)
Underneath that it will say
Stay More Save More starting at $343.40 (which would be the discounted King Suite)
You must be staying for at least 4 nights to get the Stay More Save More.
Sometimes the AAA website shows you the (undiscounted) seasonal rate. So you might have booked through AAA but not gotten a discount.
I believe they only allow a limited number of people to get the AAA rate and the Stay More Save More rate.
I booked the Seasonal Rate, and then checked every morning for weeks to see if the Stay More Save More was available. By playing around with the dates, I figured out that the problem was the Saturday night of my stay. I could get the discount if I checked out on Friday or if I checked in on Sunday. Eventually somebody who had the discount must have cancelled the Saturday night because the website showed that the discount was available for my nights. So I called and they applied the discount for me.