Orderby date wont show in order when echo to screen

When I query the database I get a collection ordered by date exactly how I need it. But when I run foreach loop and echo the screen its all messed up the order.

Why this is happening...?

Schema::create('units', function (Blueprint $table) {
            $table->increments('id');
            $table->string('number')->unique();
            $table->integer('publish')->default(0);
            $table->date('available_on')->nullable();
});

$units = DB::table('units')->orderBy('available_on', 'asc')->where('publish', 1)->get();
foreach ($units as $unit) {
        if ($unit->available_on <= Carbon::now()) {
            echo "{$unit->number} Available Now" . '<br>';
        } else {
            $date = date_create($unit->available_on);
            echo $unit->number . ' ' . date_format($date, "M d - Y") . '<br>';
        }
    }