while filtering through checkbox shown only latest

Question

When I select football it shows the football data, then when I select dance it shows the dance data but football data not shown where football is checked. I don't know why this problem has happened.

Here is my code:

blade file

@foreach ($featured as $playlist)
    <li class="lib">
    <!-- <a class="open-library" href="{{ route('public.playlist', $playlist->slug) }}">{{{ $playlist->name }}}</a> -->
        <a>
            <input type="checkbox" class="open-library" name="" id="{{ $playlist->id}}" data-value="{{ $playlist->slug}}">{{ $playlist->name}}
        </a>
    </li>
@endforeach

js file

$(".open-library").change(function () {
    var val = $(this).data('value');
    var id = $(this).attr('id');
    if ($(this).is(":checked") == true) {
        $(":checked").serialize();
        $.get("{{url('/playlist')}}/" + val, function (data) {

            refreshedPage = $(data);
            newDemo = refreshedPage.find(".libraryWrapper ").html();
            $('.libraryWrapper').html(newDemo);

        });
    } else {
        $.get("{{url('/playlist')}}/" + val, function (data) {
            refreshedPage = $(data);
            newDemo = refreshedPage.find("load-more-pagination").html();
            //$('.load-more-pagination').hide();
            $(".load-more-pagination").hide(newDemo);
        });
    }
});

controller

public function getProject($slug)
{
    $sortBy = Input::get('sortBy', 'reference');
    $dir = Input::get('direction', 'asc');
    $id = UniqHash::unhash($slug);
    $project = Project::whereId($id)->first();

    if (!$project) {
        return Redirect::route('home');
    }

    $tracks = null;

    if ($project->tracks) {
        $ids = json_decode($project->tracks, true);

        $tracks = Element::with('composers', 'format_mp3s', 'loopsets.format_mp3s', 'mixes.format_mp3s', 'opening_key', 'closing_key', 'speed', 'mood', 'metre', 'tonic')
            ->whereIn('id', $ids)
            ->orderBy($sortBy, $dir)
            ->get();
    }

    $this->layout->content = View::make('public.projects.show', compact('project', 'tracks'));
}