Quote Originally Posted by dbltoe View Post
Looks like the admin/includes/functions/extra_functions/stats_monthly_sales.php is the culprit.

It checks to see if the stats_monthly_sales page key exists and adds the extra report menu item. It apparently does not check to see if the specific menu item (FILENAME_STATS_MONTHLY_SALES) already exists. Thus your second menu item is registered in the admin_pages table of the database.

You can use the phpMyAdmin to search the table for FILENAME_STATS_MONTHLY_SALES and delete one of the entries. That should fix it.
Thank you for the suggestion.

I have the dilemma which line to delete, top or bottom?

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Why, do you think, the file stats_monthly_sales.php was not copied to admin/includes/functions/extra_functions/ in first place?

All other files were. Is it permission issue?

Should I copy it manually now?