jqueryui Autocomplete. what m i doing wrong - jquery-ui

Question

so heres is the prob im calling two variables from the input and on the "#key" variable the last call in the database from "split( this.value );" makes it out put like this
//this is fine
touser: karen galante, jor monucha, wappa who,
//this needs to be
rnkey: karen galante,jor monucha,gdhdf9j7hd98fg7dfn,
// nappppaa8686f86df8,iuof79f79ds7h8j7kg70gfd70fg8dsf,gdhdf9j7hd98fg7dfn,
im new to jquery ui and iv been working on this code for a copple days now, any ideas
$(function() {
var availableTags = [
{
value: "iuof79f79ds7h8j7kg70gfd70fg8dsf",
label: "jor monucha",
desc: "the write less, do more, JavaScript library",
icon: "16.png"
},
{
value: "nappppaa8686f86df8",
label: "karen galante",
desc: "the write less, do more, JavaScript library",
icon: "16.png"
}, {
value: "gdhdf9j7hd98fg7dfn",
label: "wappa who",
desc: "the write less, do more, JavaScript library",
icon: "16.png"
},
];
function split( val ) {
return val.split( /,\s*/ );
}
function extractLast( term ) {
return split( term ).pop();
}
$( "#tags" )
// don't navigate away from the field on tab when selecting an item
.bind( "keydown", function( event ) {
if ( event.keyCode === $.ui.keyCode.TAB &&
$( this ).data( "autocomplete" ).menu.active ) {
event.preventDefault();
}
})
.autocomplete({
minLength: 2,
source: function( request, response ) {
// delegate back to autocomplete, but extract the last term
response( $.ui.autocomplete.filter(
availableTags, extractLast( request.term ) ) );
},
focus: function() {
// prevent value inserted on focus
return false;
},
select: function( event, ui ) {
$( "#project" ).val( ui.item.label );
$( "#project-id" ).val( ui.item.value );
$( "#project-description" ).html( ui.item.desc );
$( "#project-icon" ).attr( "src", "images/" + ui.item.icon );
var hintkey = split( this.value );
// remove the current input
hintkey.pop();
// add the selected item
hintkey.push( ui.item.value );
// add placeholder to get the comma-and-space at the end
hintkey.join( ", " );
hintkey.push( "" );
$( "#key" ).val(hintkey);
var terms = split( this.value );
// remove the current input
terms.pop();
// add the selected item
terms.push( ui.item.label );
// add placeholder to get the comma-and-space at the end
terms.push( "" );
this.value = terms.join( ", " );