you would think that this code:
Code:
for (var i=1;i<100;i++){
        $( "#draggable" + i ).draggable();
		}
would have taken care of that

something I noticed: "clicking on the back to list" link hides the draggable divs (because they still "belong" to the divs on the left, even though they have been dragged. you may want to add these two lines to the drop function:
Code:
$(ui.draggable).appendTo($(this));
$(ui.draggable).css("position","");