Related to one-year regular payment

1년 정기구독 23,100원 짜리를 사용하고 있는 학생입니다.

원래 정기결제일이 매월 5일이었습니다. 이번달 문제 때문에 하루 뒤인 12월 6일에 결제된 이후에 

24일에 23,100원이 한번 더 결제 됐더라구요? 왜 결제된건가요?

translate:

I'm using a translator because I can't speak English. Please take into consideration the poor communication.I am a student who is using a 23,100 won subscription fee.
The original regular payment date was the 5th of every month. Because of this month's problem, the payment was made a day later on December 6th.