why cant I put AF 1.5, new season event item and pre-order item into Aimorie ?

[Shneibel]

If it follows FFXI at all with the event storage etc. then new event items won't be storable until the update after their release. That means these items should be storable after 2.1 and any event/blue items released in 2.1 will have to wait until 2.2. Not sure why this is the case.

a weird system if you ask me, but I d like to have an answer from the Dev about this

[Alpheus]

In recent updates FFXI has actually been pretty good at modifying storable options when they add a new event swimwear or with the 2 new classes they added storable options via the AF Mog Slip for the Runefencer and Geomancer's AF equipment and weapons the update those items went live. I can't imagine them being a step behind in that regard in ARR.