I
It isn't disabled in the main php.ini of your server. So if you're trying to disable in your public_html/php.ini but it seems it should be corrected in the usr/bin/php.ini or smth else. Anyway it better to ask your hosting support.
So their are multiple php.inis? Never knew that
Yes, it is used as the main php.ini with all settings and sub php.ini where you may set your own small changes.