As I said, that's simply not how templates work, whether original or otherwise. What you're after would require the use of an Auto_Open macro that uses brute force to reformat every workbook you open - and a Worksheet_SelectionChange macro to reformat every edit you make. Expect Excel to run quite slowly when opening large files if you do that, as the Auto_Open macro would have to test every cell's format so it doesn't reformat dates, percentages, etc.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]