The 4/3 deal is based on a code. Only ONE code can be applied to a package rez. The AAA discount is applied to a rez as a code (and it's only up to 20% off the hotel portion of the deal).
To however was told that they got a better price, RECHECK every detail of the rez. Something is not there correctly, be it wrong dates, ticket options (hopper, water, number of days), or insurance. Even check the children ages as one could be wrong and give you child price instead of adult (10+ are adults for tickets).