Sortable: Marginal event descriptions

When i was applying draggable and sortable i discover a difference between the ui.item that is given to the beforeStop and the receive event.

For both the api description is:
"The jQuery object representing the current dragged element."

http://api.jqueryui.com/sortable/#event-receive
http://api.jqueryui.com/sortable/#event-beforeStop

but when i modify ui.item in the receive callback the origin dragged item is modified, but not the dropped item. While i modify the ui.item in the beforeStop event the dropped item changes and not the origin (i my case the lastest was desired).

Is it possible to describe in the documentation bit more elaborated what the ui object is? or what the context is of the callback event.
With this information the differences between the events become more clear imho.

Start with the Sortable API entries for the receive and beforeStop events linked in the issue. Compare their descriptions of the ui object and ui.item, then document the callback context and the observed difference between the origin and dropped elements. Done means both event entries clearly explain which dragged element ui.item represents.