It’s extremely frustrating that this has gone on as long as it has. It’s a simple bug to fix. The code is looking for the digit “0” in the cell, which means that any org with a multiple of 10 users (i.e. 20, 30, etc) will be hidden.
To fix, edit the include/staff/orgs.inc.php file and remove this line at the end..
$('table.list td:nth-child(3):contains("0")').addClass('user-count-hide');
It’ll show 0 users if any of your ORGs have none.