Champions Bayer Leverkusen squandered a 2-0 lead for the third time in six Bundesliga season games in a 2-2 draw with lowly Holstein Kiel on the second anniversary of coach Xabi Alonso’s arrival, and Borussia Dortmund crashed 2-1 at Union Berlin. Leverkusen were 2-0 up after eight minutes from Victor Boniface and Jonas Hofmann, both set up by Exequiel Palacios who turned 26 on the day. Boniface had another goal chalked off for offside as promoted Kiel had to fear the worst. But Kiel were back in the game out the blue from Max Gschwill’s header on the last play of the half. They improved after …