Sisters Erica and Courtney Dobbs are like a twin-engine jet. Yesterday they helped lift Deep Run High to a second straight Central Region Indoor track and field championship. “That’s an important family,“ said coach Drew Stockdreher after his Wildcats outraced runner-up Lee-Davis 95-80. “The sisters are different in some ways, but what they share is an incredible level of competitiveness; they’re intense racers who bring a lot of energy to our team.“