Are you saying after all the wizards are done on your PS3. download the updates press play and when you get to the FF game window and press start and has a select service account to play like this:

Final Fantasy XIV 1
Final Fantasy XIV 2.

And "1" gives an error to go to mog station and add platform and crashes during the opening movie? but when you select 2 it works but your chars and other account options are gone?

Well this happened to me with a FF PC 1.0 CE legacy + pre order items service account when I tried to register the BR disk PS3 CE code. Even when I checked the radio box to put it into the SE service account that listed like all 8 other codes (legacy,betas,bounes,preorder etc all worked) but this stupid system on the PS3 messed up and made a new service account even with the radio button on my current one.

IF this is your problem? or you trying to avoid this problem?

On the huge 300+ page thread in this support form is a link to fill out to fix it but make sure you pick and fill out the one that has the problem trying to move one service account to another service account inside the same SE ID.