Hi all -- I just used link on page 4 of this thread (commerce4adventure) to buy 4 multiday tix to SW/Aquatica. I used the southwest code, and had no problems. The tickets do NOT have a start date, they just state that Aquatica opens "in March." They have an expiration date a year from today. There's nothing on the tix that IDs them as having been bought with any kind of special code.
These are the advance-purchase tix that you have to buy 7 days before your first visit. For adults with the discount it was $75 and change; for kids, it was $65 and change. These give you unlimited admission to both parks for seven days from the first entrance.
Hope this helps. Nobody needs anyone to PM them anything! Just go to page 4 of this thread!