Issue
When I open an Excel file for edit via desktop, multiple versions of the file are opened.
The Activity section in the FYI drawer also shows numerous start and finish date/times.
Cause
This occurs if the workbook was saved when multiple windows were open for that workbook.
Solution
This is a function of Excel.
The following Microsoft article provides more information and steps on how to help solve the issue:
https://support.microsoft.com/en-au/help/272025/when-you-open-a-workbook-excel-may-display-multiple-windows-that-conta