An offer last week by the San Diego County Water Authority board chairman to settle a host of litigation with the Metropolitan Water District of Southern California was not well received by water officials to the north. MWD leaders accused their San Diego counterparts of violating an agreement to negotiate in private and abruptly canceled a meeting previously scheduled for Tuesday. “We were surprised by the unilateral decision by the San Diego County Water Authority to make the proposal letter public as our ongoing discussions … were confidential and our agencies have an executed confidentiality agreement governing those discussions,” the MWD chairman wrote Monday.