Whenever you add a member or guest without using the 'add' command, you get both a success msg and an error msg. Also, if you put a command but not a name, you get 2 error messages.

This is caused by lines 102-105 (for member) and 151-154 (for guest) in Modules/Roster.php
if (empty($vars[2]))
{
$this -> bot -> send_output($source, "You have to provide a character name", $type);
}
This is redundant code, as there are already error handlers in place for each command, and should be removed.

This is a bug.

Upon the first error you should bail.