Column select (clicking on the column letter) is not recorded at the start of a
macro.  The problem this causes is that on subsequent use, the macro will format
whichever column contains the currently-selected cell, rather than the
originally-specified column(s).
To reproduce:
1) Open a new spreadsheet, say from Quickstarter.  Cell A1 will be selected.
2) Begin macro recording.
3) Click on the header letter for Column B.  Column B is selected. [This is not
recorded.]
4) Shift-click on header "D".  Columns B, C, and D are selected. [This is also
not recorded.]
5) Format the selection.  For example, Format > Column > width... > spin the
spin box some > OK [This records just fine.]
6) Stop recording, save macro. Inspection shows no selection information
recorded. The actual formatting is the first thing in the macro.

Workaround: select a dummy range, for instance, click on B1 and shift-click on
D3, instead of using the column headers.  This records and works fine.
Therefore, this probably deserves only P4, but it's a bug, and if somebody's in
the code . . .