Not receiving "New Xfinity sign-in" or "Information has been updated" emails when making changes or changing password

Why am I no longer receiving notification emails to the account email address when I make updates to my account, change my password, or when there is a new Xfinity sign in?  I used to get them, but I noticed today that when I was locking down a secondary account, those emails are no longer coming into the linked account.  Test emails are reaching the account just fine, just no email documentation being sent to the account's email that a change was made or that my password had been reset.

I have a particular account that has had a history of being hacked and after having to work with Comcast support it seems like the behind the scenes solution was just to stop notifying me when someone new signs in, the secondary contact info and/or password are changed.  I would REALLY like documentation of these instances when they occur since it has been a problem.  Is this a setting somewhere?  Are these kinds of emails just not being sent out anymore?  Or is it something else?

@Comcast/Xfinity:Please don't reply with a canned answer that doesn't apply.  Only answer if you actually understand what I am asking and have something of value to say, otherwise please refer this question to someone else.

Also, and I know this is probably asking too much, but it would be really nice to use the parent account email or associated phone number for MFA.  It sucks that I can't use MFA on a secondary account without a second phone line.  ...On that note, why is a phone number the ONLY MFA option?