hmm.. there is really a limit of possible combination for the App Store system: user (multiple), credit card (multiple), location (multiple), devices (multiple)

hmm.. there is really a limit of possible combination for the App Store system: user (multiple), credit card (multiple), location (multiple), devices (multiple), authorized computer (multiple) -- times X amount of actions (add/remove/edit/assign/etc) Time to time a rather rare combination of the above makes the system clusterf*ck and the the post like this one pops up. This makes me believe that Apple engineers are too lazy to... use the UML ??