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 ) -
so maybe if you used this method, and received faulty results,
there's 'a bug' in these later edition LO programs.
Hoping this helps,