This marks the beginning of a new era of facial recognition in social media, which is essentially a labour saving innovation so that you won't have to spend all that time tagging your facebook photos.
Instead, you'll spend all that time untagging them.
They do this all the time and it's infuriating. I recently noticed that my contact email had been updated to an @facebook.com email address and my normal @gmail.com contact email had been set to hidden.
If it's true, a notification would have been nice. Or changing the setting back only for people who haven't specifically looked at and increased their privacy settings in the past
But then they'd be directly acknowledging the abuse, and then you could quickly change it back - however they want pictures to be tagged of you and to become public so they can be shared to everyone who they think will engage / comment on them, etc..
What part is incorrect? The OP claims the setting was set before and now it isn't set anymore. Telling him/her how to put it back doesn't address that....
Instead, you'll spend all that time untagging them.