Jquery Image not visibly dragging after first drop -

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i'm jquery neophyte i'm trying simulate lightbox number of images may exist on page , have have "floating" dropzone user can drag , drop images drop zone added lightbox.

the lightbox consists of table 2 rows , 4 cells, there divs within each cell dropzones.

i going use table/cells adjust order of images (which saved (among other things) via ajax server.)

i have centered image via snap need position div statically contained. perhaps there's solution in each case when omit adding position/static draggable not position within container divs or table cells: 

         $(".dropboxes").droppable({  // recenter image once dropped          drop: function (event, ui) {              //need check if exists first more logic follow              $(this).find("div").attr("class", "drag2").remove();              $(this).append(ui.draggable.css('position', 'static'))          }      });

the image dragged dropzone draggable new drop zone, image on second drag not show image or div still drop correctly. if remove "$(this).append(ui.draggable.css('position', 'static'))" second drag works correctly it's not contained within dropbox.

here's fiddle: fiddle


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