Responses
The 1st one in rank get to decide who he wants to be in, in the final debut group. Moondae being moondae, decided not to because he might get criticize for choosing one, in the end he just concluded that whoever got the highest votes next to the 6th person in the group gets to be the final member. That's why Bae Sejin got in instead of gold 2.

How did Bae Sejin got into the final team?