The following information is kindly explained to the customer information center of the subway station. Even though it was after 7pm, the staff was still there.
When purchasing a ticket, purchase it based on the section of the ride. (Rightmost column in the table above) If you live in Yangjae and commute to Pangyo, you will need to purchase a level 9 ticket. It can be used up to 60 times in 30 days, and the remaining amount expires after 30 days. 신분당선 정기권
When using other sections, the number of tickets is deducted according to the distance traveled. Therefore, the commuter pass is not only available for that section, but can be used on all lines. However, it cannot be used on the bus. 좋은뉴스
Since I only work 4 days a week and work from home one day, it was not particularly beneficial. It would be nice to travel around a lot by subway.