For anyone who installs mini-top on a fresh install and can only see 3 images, instead of 5....
In other words, you only see Most Rated, Most Voted, and Most Viewed
You do NOT see Most Commented, and Most Downloaded
Go into your ACP to General/Settings/Image Setting -> Image table cells
Set this field to 5 instead of 3 which is the default.
This took me quite a long time to figure out.
I also tried V@no's suggestion of updating the following array:
$selection = array('rating', 'votes', 'hits', 'comments', 'downloads');
$selection_alt = array('votes DESC', 'rating DESC', 'hits DESC', 'comments DESC', 'downloads DESC');
However, I still did not see all 5 columns until I changed the setting in the ACP.