I received a notification tonight that I had earned Yearling on Area51:

However, it's not showing on my Area51 page:

It also doesn't appear in my network profile, so it's not a problem with display in Area51:

What's up with this? Do I have an invisible badge, or did I receive an erroneous notification?

(And by the way, if the badge is supposed to be there, shouldn't I have two of them? I've been over 200 rep there for rather a while, so either I had it on my first anniversary or I should have gained the badge when I got it after that.)

I received a notification tonight that I had earned Yearling on Area 51:

However, it's not showing on my Area 51 page:

It also doesn't appear in my network profile, so it's not a problem with the display in Area 51:

What's up with this? Do I have an invisible badge, or did I receive an erroneous notification?

(And by the way, if the badge is supposed to be there, shouldn't I have two of them? I've had over 200 reputation points there for rather a while, so either I had it on my first anniversary, or I should have gained the badge when I got it after that.)