Jumping a kingdom straight out of eowcf is hardly unheard of, learn/plunder waves are fairly common since you can get away with a decent amount of resources from someone who might not be ready to fight back just yet. The "notice" system is either a courtesy or dictated by deals made as in this case, doesn't really change the fact that waving/hitting into a kingdom who just left eowcf (while sleazy) is just part of the game at this point. People should start making more waterproof cf/notice deals, so much bull**** gets started simply by 2 kingdoms interpreting/bending the same rules/deals to fit their side of the story.