Does the workbook have macros?
If so check in the Woorkbook Module for something on these lines
That will cause the workbook to default to the last sheet created every time the workbook is activated.
Sounds like that might be your problem, someone might have thought it would be handy when the workbook is opened, it defaults to the current info sheet.
If you find similar code in your workbook in the Activate Event
Try putting it in the Open Event
That will then mean that the workbook opens with the current info tab (Top Tab?), and will not activate again until the book is closed then reopened, rather than when you switch windows.
Hope this helps
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