"Specified incorrect age on Social Networking Website"

The alert "Specified incorrect age on Social Networking Website" has come up after accessing Facebook a couple of times. I know what this is supposed to mean, but I shouldn't be receiving this alert. It is coming with me logged into Facebook--not my child-- and only after accessing one specific person's profile. In other words, whenever I view the profile of Jane Doe, I get the alert. It's as if this person's profile is being flagged, but it's not (or shouldn't be!). Any thoughts as to why this is?

Thanks for your help!