I have a very simple list view of 13 lines (products) inserted into a spreadsheet and want to add some data + calculations.  However, every change that I make takes forever to save.  So when I edit and make changes, even after waiting for a minute, if I then close the spreadsheet and reopen it, only the first 1 or 2 changes are saved, all the others are gone.  Re-opening the sheet and changing it again doesn't help.  

Is there any specific configuration needed for it to work properly ?