Cant get rid of swimware from Moonfire Faire

I bought a two of the same swimware with out realizing it form the Moonfire Faire and cant store them in armoire couse I have 1 in there and it wont let me discard them either. So am I stuck with the extras taking up space in my inventory? Or is this a glitch?

This is a well known glitch. Any item stored doesn't register as you having owned it. So you can double up on items that are supposed to be unique. There are about 10 threads with similar issues. No word on when a fix is coming.