The worksheet contains the new rows, but the print preview stops at the old total. A saved print area can explain this: Excel prints the designated cells rather than every used cell. Making the page smaller will not bring excluded rows into that range.
Inspect and expand the range
In desktop Excel for Windows, use Page Layout → Print Area to inspect or replace the worksheet’s print selection. You can select the intended cells and choose Set Print Area. The setting is saved with the workbook.
For example, a report originally printed A1:D20. You add rows 21–25 below it. Select A1:D25 and set that as the print area, then reopen File → Print. Check that the new last row and its values appear. Only after the correct cells are included should you adjust page width or scale for readability.
Avoid creating an unwanted second area
Add to Print Area can extend the range with adjacent cells. A nonadjacent selection creates a separate print area, which prints separately. If the preview suddenly shows extra pages, inspect the areas instead of assuming the printer duplicated the report.
Clear Print Area removes all print areas on the active worksheet, not just one chosen block. Work in a copy if you need to preserve the original setup. After changing the range, inspect the first and last printed rows, page count and any hidden or filtered data you expect to include. This checks the output before paper or PDF export.