SEATTLE — Alaska Airlines canceled and delayed dozens more flights Saturday as a pilot shortage continued to wreak havoc with its schedule. At Seattle-Tacoma International Airport, the airline canceled 59 flights and delayed 28 others before 9 a.m., according to FlightAware. Overall, Alaska canceled 88 flights as of 9 a.m., about 7% of its operation, impacting more than 12,000 passengers, the airline said in a statement. The number was continuing to grow almost by the minute. On Friday, the airline canceled 68 flights at Sea-Tac and more than 120 overall, affecting at least than 15,300 travele…