Seabourn's dress code is very confusing. I am on back to back 7 night cruises in the Med on the Odyssey in October. I was initially under the impression that there would be formal nights, but then I read on CC that they were eliminated on the 7 night Med cruises. My online account showed none for my two sailings. Then I read that this had been changed effective in October and now my account shows one for each segment. Do I understand correctly that "formal optional" means a tux or dark suit for the main dining room but a jacket with no tie is sufficient for the other dining venues or is it formal optional everywhere on the ship?