Can you upload a short example file that we can download and play with. Make sure there is no personally sensitive data in it.
Upload the file to your OneDrive account, then get a Share > Edit link and past it in a reply here.
I suspect you are simply missing a step, making a mistaken assumption about how Sort works. Here are a couple of tips on doing sorts. Maybe one of them will help you figure out what is going wrong:
Sorting Letters and Numbershttp://excelribbon.tips.net/T009600_Sorting_Letters_and_Numbers.html****Sorting information in a worksheet can be confusing when Excel applies sorting rules of which you are unaware. This is especially true when you are sorting a mixture of letters and numbers.
Performing Complex Sorts
http://excelribbon.tips.net/T007216_Performing_Complex_Sorts.html****One way you can easily work with data in a worksheet is to sort it into whatever order you find most helpful. Excel allows you to
perform sorting ...
How to Sort Excel Date
http://www.innatespreadsheet.com/dynamic-excel-reports-and-dashboards/excel-dashboards-reporting-techniques/sort-excel-date/
http://www.innatespreadsheet.com
I thought for several years that dates were a different kind of data, I assumed that the approach to Sort Excel Date was different from sorting numbers. The reason? The format is like mstical, the slashes / or dashes – evoke a special kind of information, look
these two examples: 01/11/2002 or 01-11-2002.
Sorting an Entire List
http://excelribbon.tips.net/T007222_Sorting_an_Entire_List.html****Need to sort all the data in a table? Here’s the fastest and easiest way to do it.
Sorting Dates by Monthhttp://excel.tips.net/T003183\_Sorting\_Dates\_by\_Month.html
Sorting by dates is easy, and you end up with a list that is in chronological order. However, things become a bit more tricky when you need to sort by month. Here are severa approaches you can use
Sorting Dates by Month, Take Twohttp://excel.tips.net/T002631_Sorting_Dates_by_Month_Take_Two.tml
Understanding Ascending and Descending Sortshttp://excelribbon.tips.net/T012399_Understanding_Ascending_and_Descending_Sorts.html
****When you sort information, Excel follows a set pattern of how your data is organized. This tip illuminates the burning question of what ordering Excel uses.