I found a very strange thing.
I have a list of 6 values with a formula of =Sum(a1:a3)-sum(a4:a6).All the value is nul.
Now what is strange if I have a values in cell a1 to a3 and put a value in cell a4 the function changes to =Sum(a1:a4)-sum(a4:a6).
Refer attached file
Are there a place to put this nice/ irritating feature off.
Thanks
Mario