How to add/delete a column without changing the size of the other columns

Granted this article(?) is written in 'computerese' which makes it
difficult to interpret,
            yet near the bottom - that numbered list does state what to do
to add and/or delete columns and/or rows;

       this is the method I used the few times I used this part of LO
(actually, maybe when it was OO :wink: ) -
           so maybe if you used this method, and received faulty results,
there's 'a bug' in these later edition LO programs.

       Hoping this helps,