how does visible two models value in one view and update two models value by one controller

I have two Models Group_ones and Group_twos. I show this value in ac_config.ctp file.

My controller code is below

public function ac_config($id = null)
    {
        if (!$id) {
            $this->Session->setFlash('Please provide a Site id');
            $this->redirect(array('action'=>'dashboard'));
        }

        $site_id_1          = $this->GroupOne->findById($id);
        $site_name          = $site_id_1['GroupOne']['site_name'];
        $ac_one_time        = $site_id_1['GroupOne']['ac_on_time_one'];
        $group_one_active   = $site_id_1['GroupOne']['active'];

        $site_id_2          = $this->GroupTwo->findById($id);
        $ac_two_time        = $site_id_2['GroupTwo']['ac_on_time_two']; 
        $group_two_active   = $site_id_2['GroupTwo']['active'];


        if (!$site_id_1) {
            $this->Session->setFlash('Invalid Site ID Provided');
            $this->redirect(array('action'=>'dashboard'));
        }

        if (!$site_id_2) {
            $this->Session->setFlash('Invalid Site ID Provided');
            $this->redirect(array('action'=>'dashboard'));
        }

        if ($this->request->is('post') || $this->request->is('put')) {
            $this->GroupOne->id = $id;
            $this->GroupTwo->id = $id;

            if (($this->GroupTwo->save($this->request->data)) || ($this->GroupOne->save($this->request->data))) {
                $this->Session->setFlash(__('AC Configuration has been update'));
                $this->redirect(array('action' => 'ac_config', $id));
            }
            else
            {
                $this->Session->setFlash(__('Unable to AC Configuration has been update.'));
            }
        }

        $this->set(compact('site_name','ac_one_time','group_one_active'));
        $this->set(compact('ac_two_time','group_two_active'));

        $this->set('group_one', $site_id_1);
        $this->set('group_two', $site_id_2);

        if (!$this->request->data) {
            $this->request->data = $site_id_1;
            $this->request->data = $site_id_2;  
        }
    }

My view content is below

Problem occurs when I save button. It only save group-2 form values in database. When AC Run Time and AC Rest Time show Group-2 then form values save in database of the Model Group_twos and AC Run Time and AC Rest Time show Group-1 then form values save in database of the Model Group_ones.

Another problem is below

if (!$this->request->data) {
    $this->request->data = $site_id_1;
    $this->request->data = $site_id_2;  // this show rest time, run time
}

If I write this above code then I get

if (!$this->request->data) {
    $this->request->data = $site_id_2;
    $this->request->data = $site_id_1;  //this show rest time, run time.
} 

Again if I write this above code then I get

But I need AC Run Time and AC Rest Time both group same time and when I click save button any two group that corresponds group value save in Model. Whats my wrong my logic.

Thanks your help.

Simply merge the two arrays before setting the request data:

if (!$this->request->data) { $this->request->data = array_merge($site_id_1, $site_id_2); }

If this does not help, it would be useful to see the code of your view as well.