The answer is in your own post.
In the games played between Amedspor and Adrians FC, each team won one, so points are 3-3: the tiebreaker goes to #2.
Amedspor won their home game 2-1, and Adrians FC won theirs 2-0. Thus, the total goal difference between the teams is +1 in favor of Adrians FC. Because of this, Adrians FC wins the tiebreaker, and finishes 3rd.