Hi smartmax
You can open the XML file of this module:
/templates/ja_symphony/acm/gallery/tmpl/style-1.xml
and add additional options for number of columns there, like this:
<field name="number_col" type="list" label="GALLERY_NUMBER_COL_LABEL" description="GALLERY_NUMBER_COL_DESC">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="8">8</option>
<option value="12">12</option>
</field>
Then go back to the backend of this module, select the number of column, it will show fine.