Moving item from one list to another - acts like clone

You can see the problem on the demo page: http://rubaxa.github.io/Sortable/

Go the the 2 lists for the Angular demo.

1) Drag 1st element from left to right, see item still appears on left side
2) Drag 2nd element from left to right, see error on console: "Cannot read property 'split' of undefined"