UNABLE TO SAVE CHANGES TO MY SPREADSHEET

English
#1

I do one save Then open or even keep open and make changes and do a save- lost changes
I do above but save a -1 the changes between first and -1 are never saved WHY? what should I be doing?

Impressum (Legal Info) | Datenschutzerklärung (Privacy Policy)   Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.