A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
a) All the data is text, regardless how the cells are formatted (even before input).
b) I can not reproduce the issue.
c) Excel's sorting is subject to the system's regional settings. Reset the settings as described in this article:
System settings - How to import a CSV file that does not match your - Microsoft Community
d) If that doesn't help we need to see your file. It is possible that your file contains invisible characters that were not copied here when you transferred the data.
Andreas.