Both Bluffton’s boys’ and girls’ swim teams got victories at Manchester on Thursday. Bluffton’s boys kept their perfect season alive, improving to 10-0 by scoring 138 points. The Tigersharks won 10 of the 12 events. Caleb Geimer and Bryson Mayer each scored 15 points to lead Bluffton. Geimer won the 200 individual medley and 100…