Multiple GC Provision Submission text error

Hello

When talking to C'lafumyn, the Storm Sergeant in Costa Del Sol, I started to hand in a couple of excess Aetherial items from dungeons. I had more than one Aetherial Dress Shoe on me, so when I went to put it in, I chose to submit 2 in one go. After I selected them from my armoury chest and pressed confirm, I got a message "Are you sure you want to submit an item with materia in it.

I checked and neither item had materia and when i submitted them individually, I got no error message. Was the pop up warning meant to have been a double check that I wanted to submit multiple items instead?