When exporting a report to Microsoft Excel the page break does not work. However, page break works when the report is being exported to .PDF format.
Page break option is available only if the reports are exported to the .PDF format from the Web TimeSheet PDF button. Page break option will not be available when the document has been printed using the soft copy printers like Microsoft XPS Document writer, Microsoft Office Document Image Writer, Cute PDF creator or any physical printers.
In case, if you are in need of page break option in reports, please enable the page break option in reports and export the data into .PDF format and then print the document from the saved .PDF file. Which will print the data same as available in the PDF with Page Break option enabled.