Hi,
The problem is a separator issue. You have selected to use the comma separator instead of the semi colon for CSVs in the configuration. However, in the date format, there is actually a comma. So when excel opens the CSV, it shifts the columns as it sees the dates in two columns instead of one.
If you change the separator, that should fix the issue automatically.
Alternatively, you can overwrite the file administrator/components/com_hikashop/classes/widget.php with the one in this archive to fix the issue.