HOCKENHEIM, Germany: Formula One’s rule-makers took another U-turn on Saturday when they agreed a compromise on track limits at the first corner of the Hockenheim circuit. In the process, they left a global audience of fans, many seasoned paddock observers, team staff and drivers confused and puzzled. It was just one more in a series of rule changes made almost daily in the last week in a season of upheaval that began with uproar over a controversial new qualifying format introduced at the season-opening Australian Grand Prix. Last weekend’s Hungarian Grand Prix saw a stewards investigation into the meaning of waved double yellow flags which will, this weekend at the German Grand Prix, automatically engage a red flag and stop the action.