Created attachment 85489 [details]
Libre Office vs Excel
It is necessary to move selection of sum from other corners except bottom right. At the moment you need to move the whole selection up and then click on bottom right corner to expand selection of the sum.
It is necessary to simplify the process by adding the ability to move other corners also like in Excel. See attachments.
Solved in master - it will be available in LO 4.2
*** This bug has been marked as a duplicate of bug 67592 ***