Sortables update callback and connectWith

I am having a little trouble with the update callback when i drag an
item from one Sortable to another.. the update function gets called
twice.. is there anyway around this or am i going to need to think of
a way around the 2nd call?
The calls are going to be sending a json array to the backend with the
sort order to update the database and i dont really want that
happening twice.. Thanks!!
James