A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
With your data in its preferred original sort order, add a new column at the right end. In the first cell put a 1 and then a 2 in the second cell. Select both and drag the fill handle (lower right corner of the selection) down to the extent of your data. This should provide a series of numbers from 1 to however many rows you have. After sorting and filtering, you can easily revert back to the original sort order by using the helper column's series of numbers to sort on.