why only 2 values getting updated instead of all 4

I have a strange problem with update_options, and with add_options.
the original stackQ :
https://wordpress.stackexchange.com/questions/134312/why-only-2-values-getting-updated-instead-of-all-4-update-option

I have a 4 var array, and try to update_option and get 2 var that is getting updated insted of 4. The script is running on admin_init.

$new_settings = array(
    'Candle' => $options['Candle'],
    'Havdala' => $options['Havdala'],
    'updatestatus' => $updatestatus,
    'lastUpdate' => $nextUpdate,
);

update_option('wp_shabbat_settings', $new_settings);

When the plugin is created I register the function:

// create default values when user activate plugin
function wp_shabbat_activate() {

delete_option('wp_shabbat_settings');       

$settings = array(
'CandleDefault' => 20,
'HavdalaDefault' => 18,
'Candle' => 20,
'Havdala' => 18,
'updatestatus' => 'Plugin DataBase need to be updated',
'lastUpdate' => 0,
);

add_option('wp_shabbat_settings', $settings);

include( plugin_dir_path( __FILE__ ) . 'wp-shabbat-update.php');

 }
  register_activation_hook( __FILE__, 'wp_shabbat_activate' );

If I change the first two values the db getting updated , but last 2 aren’t changing.

I tried this also and got the same result.

$new_settings = array(
    'Candle' =>55,
    'Havdala' => 55,
    'updatestatus' => 55,
    'lastUpdate' =>55,
);
print_r($new_settings);
update_option('wp_shabbat_settings', $new_settings);
    print_r(get_option('wp_shabbat_settings'));

result of print_r:

Array ( [Candle] => 55 [Havdala] => 55 [updatestatus] => 55 [lastUpdate] => 55

result print_r(get_option(‘wp_shabbat_settings’)):

Array ( [Candle] => 55 [Havdala] => 55 [updatestatus] => file extracted succefully [lastUpdate] => 1391212800

more details:

if i delete the db delete_option(‘wp_shabbat_settings’); and then insert the 6 vlues to db add_option(‘wp_shabbat_settings’, $new_settings); , I get only 2 inside.

$new_settings = array(
    'CandleDefault' => 20,
'HavdalaDefault' => 18,
'Candle' => 20,
'Havdala' => 18,
'updatestatus' => 'Plugin DataBase need to be updated',
'lastUpdate' => 0,
);

    print_r($new_settings);
delete_option('wp_shabbat_settings');

add_option('wp_shabbat_settings', $new_settings);
    print_r(get_option('wp_shabbat_settings'));

result print_r($new_settings);:

Array ( [CandleDefault] => 20 [HavdalaDefault] => 18 [Candle] => 20 [Havdala] => 18 [updatestatus] => Plugin DataBase need to be updated [lastUpdate] => 0 )

result print_r(get_option(‘wp_shabbat_settings’)); :

Array ( [Havdala] => 18 [Candle] => 20 )

pls if u can help, the whole project is here :
https://github.com/drmosko/wp-shabbat