Jupp Heynckes shuffled in his seat. He shrugged and sighed, looked away then turned back to his interlocutors, fingering his chin for a moment before pulling his hand away in an instinctive gesture of baffled resignation. It doesn’t take much for the 66-year-old coach of Bayern Munich to look flustered, not with his reddish complexion and windswept grey hair. But now he looked particularly uncomfortable.   Heynckes was trying to explain Saturday’s 2-0 capitulation to Bayer Leverkusen. He sought to give a reason why his team had once again relinquished the initiative following an “outstanding” first half when Bayern had created chance after glorious chance only to fail to win a game they really should have won.   Unable to find one, he pleaded…