When I try to use a sortable event . (For instance the stop() event) It only works when I bind it using :

$('.selector').bind('sortstop', function(event, ui) { ... });

rather than

$('.selector').sortable({ stop: function(event, ui) { ... } });

Is there a missing piece in this?

The only reason I ask is because when I bind using the actual bind() method it's not giving me access to the event or ui parameters I pass in. I'm always returned undefined.