This is a little odd... .___.;; I must admit.
I noticed this glitch a while ago and ignored it in hopes that it would be fixed, but it has yet to go away. ^^;;
I still see the Chocolate Heart Box from the Valentines Day Event in the Emporio Palazzo.
Here's a screen shot if you need it. o 3o;;
It honestly isn't a bother or anything, but I figured it might be something someone might want to look into incase it happens in a future event.
I wouldn't want another fraud case to happen. ^^;;

I'm open to pms if there are questions? o__o;;