multiple webADI templates in one excel file

I have users that want to have multiple webADI templates in one excel workbook.  I have tried creating 3 templates from Oracle and saving them, then copying the tab that has the template into a single file - as 3 separate tabs.  The entries will work the first time.  However, when you re-open the file and try to send it again, it appears to be corrupted.  You can't flag the rows and when you try to upload, you get the connection to the server is unavailable error.  Is there a speacial order that needs to be followed or can you not