After opening the CSV file in Excel, the MarkedCompletedDate and CounselorApprovedBy columns contain inappropriate data. It seems that leader names should not appear in the MarkedCompletedDate column and dates should not appear in the CounselorApprovedBy column.
Looking at one such requirement record in Scoutbook, the webpage shows:
completed Nov 23, 2019
Counselor Approved on Dec 6, 2020 by Joe Smith
Marked Completed on Dec 6, 2020 by Joe Smith
the same record in the CSV export I see:
|Joe Smith|Joe Smith|12/6/2020|12/6/2020|