RCI has screwed up describing the attire they'd like to see worn with AWFUL terminology. Everyone sees the "casual" part, and concentrates on that, so that's what most of the passengers now treat it as.
That's ok by me, as I think the formal nights are enough. However RCI should quit playing the game (as Princess and Carnival have) and just designate (and call) the non formal nights, casual. Get rid of the ambiguous terminology!