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I think have a wee difficult to understand what you are doing, as I do not see any error. You put constants 1 and 2 in the cells A1 and A2 and a sum formula in A3. Then you insert an empty cell in A1 while moving the existing content in the cells one step to the right. Hence after the insertion A2 contains the constant 1, A3 contains the constant 2 and A4 contains the formula. All references are relative, so cell A4 now is = sum(A2:A3) giving the result 3, just as before. That the cell A3 computes 2 is evident as it contains the constant you put in cell A2 before the move.

So sorry, I am not clever enough to realize your problem.

Den 2015-02-12 21:14, skrev Spencer Graves:
I recently noticed that a complicated spreadsheet that had previously functioned correctly was giving 
wrong answers without warning.  After the usual wailing and gnashing of teeth, I traced the problem to a 
cell containing "=C4-SUM(G11:G1016)”.  Further experimentation produced the following simple 
version of the problem:

(1) Let A1=1, A2=2, and A3=sum(A1:A2);  A3 computes here as 3.
(2) Insert cell A1 shift right.
(3) Observe: A3 now computes as 2. This is obvious in this case but far from obvious in a 
complicated spreadsheet, where the connection between A1 and A3 is obscure. In such cases, For an 
insert that would cause an error in a reference like A1:A2, I believe that Calc should issue a 
warning something like, “WARNING: Insert may change the answer computed in A3. Do you want to 
proceed?” I further think there should be no default and the user should be forced to select either 
“Yes” or “No”.

This was observed in LO, LO 4..5.0.0.alpha0 2015-02-05 00:36:56, and MS Excell 2003 sp3.

Should this be filed as a bug report or a feature request?  If yes, which, and what message should 

Wikipedia says, "A software bug is an error, flaw, failure, or fault in a computer program or 
system that causes it to produce an incorrect or unexpected result, or to behave in unintended ways.”  I 
think this fits that definition.  However, it may qualify as a feature request, because the fix is less 
than obvious (and it has been around for so long).

Enjoy, Spencer

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