Why does my team tie other team but my team still is lose

In Cup, my team (NICKFC) was lose other team (Real Madrid FC) in first stage with score 1-0 but in second stage, my team won other team (Real Madrid FC) with score 2-1. This mean our team tie 2-2 but why do my team is lose? My team should have 2 overtime or penalty to decide win or lose in second stage but it don't have. Why?
Attachment 99783

Away goals rule. Just like reality.

oh, I understand. My team is lose because my team don't score at away. Oh, I saw Vietnamese language in topeleven.com. Before, it was English language.