Sort Order Changing?

Dan, I have a file with 250+ Ditchs with names, GPS coordinates, etc. I needed to re-sort them in the order that they are checked by a Water Commissioner so I exported the file as a CSV file . In the spreadsheet I Re numbered them in the desired/correct order in the label column and sorted on that column. Then re imported that file into EGPS, Data shows up correctly sorted just as I wanted. However, when I save the file under a new name and reopen it, it is no longer sorted correctly What could I be missing? Attached is the csv file sorted in the correct order. Ditches 2017.csv