As others have said, sales tax is due to the state in which the sale is made, as long as the selling agent has a physical presence in that state. Since AAA is reselling the tickets, they should be collecting sales taxes in the state in which the tickets are sold. If Disney Stores are collecting Florida sales taxes in other states, and not collecting/remitting the sales taxes for those states, then I'd have to believe that there are either sales taxes being imputed on the back end or something is majorly messed up with their accounting system. I have no doubt that WDW has far smarter CPAs than I do, so they may be exploiting a loophole, but this is a pretty settled area of the tax code.
Also, FWIW, when you buy something over the Internet and have it shipped to you in your state without paying sales taxes (assuming your state has a sales tax), you're legally required to report that purchase to your state and pay the sales tax yourself. Online retailers are not required to collect it on your behalf, but that doesn't eliminate the duty to pay the sales tax to your state. Obviously the overwhelming majority of people do not remit these sales taxes for these purchases, and it's still difficult for states to track, but it is technically the law.