Probably the result of differnet export DLLs, AND a different printer driver.
Windows WYSIWYG is based on the current printer installed, so make sure that they are the same.
I don't understand how your example of month names and monthly data isn't related??? And I assume that these are page headers?
Anyway, I offered a solution which you seem to have ignored.
Whether headings are manually entered in (this is impossible, I assume that you mean that they are based on parameter(s), has nothing to do with this, just create a export details section where everything is alongside each other, that way they get a nice data dump if they just want data.
If you want to emulate the report in the Excel export, then make sure that everyting is the same during development, which might be impossible since you develop in a new product and run in an older product.
-k
-k