had a non aggression treaty that i was waiting to expire so i could declare war. got to the last turn of the treaty and i get a message about another empire surrendering to the intended target. ended the turn and tried to declare war, but the option was greyed out in the diplomacy screen with the tooltip telling me i have a non aggression treaty with them. weird. so i go into the diplomacy screen and look in the Treaty Details screen....and now it says i have a non aggression treaty with them for 34 more turns.
