By update, do you mean updating to a new version of Connections, or simply modifying other settings for Connections?
I did not install a new version of Connections during this time. I agree it is very strange and I don’t know what I do that causes the settings to revert.
For now, I’ve changed all the entries to Private and I’ve added that permission to Premium Subscriber. I don’t want to risk exposing e-mail addresses and phone numbers to the Internet at large.