[NSFW] disable_comments_options wrong value

Hi, i have an issue in the disable_comments_options in my options, it suppose to have a key call disabled_post_types has list of my post types, BUT the problem somehow it stores as nested array 
i need to know why this happen ?
my disable_comments_options is:


[
'sitewide_settings' => false,
'disabled_post_types' => [
'disabled_post_types' => [
0 => 'post',
1 => 'page',
2 => 'attachment',
],
'remove_everywhere' => true,
'extra_post_types' => false,
'db_version' => 7,
'sitewide_settings' => false,
],
'remove_everywhere' => false,
'extra_post_types' => false,
'db_version' => 7,
]


thanks