There was no surprising incident in the Dortmund - Greuther Furth game and Dortmund easily defeated their opponent by 3-0. Furth were already no match for Dortmund and Dortmund needed to make up for the big mistake they made against Bochum in the last round. Erling Haaland was in fine feather again and he scored 2 goals in this game. He follows Lewandowski (18 goals) and P. Schick (16 goals) by 13 goals in the top scorers table.
If I'm not mistaken, Haaland leads in terms of goals scored to games played - he scored 13 goals in just 9 games. An amazing performance, even if you take all 3 seasons that he plays in Borussia, his average performance is higher than one goal per game - this is a rare achievement in modern football, especially when playing not for a top club.
It is true, you are not mistaken about it. He is better than Lewandowski when it comes to the amount of goals scored per game. But this can change too as Lewandowski is really in-form recently. Haaland needs to keep pushing if he really wants to be the top scorer also at the end of the season. I'm pretty sure that his priority is to enjoy his game and do his best for his team to continue getting wins.