@GamerSeuss Hello, I know I'm not related to Dynamight and this is not a response you're looking for but let me chime in here.
I think that it's possible that something went wrong when your sister was creating her account and it simply was not created via your referral link in one way or another. I am yet to hear devs doing something about these situations but seeing as not that much gain any attention in the first place one wouldn't really be surprised to hear that.
About the title thing though, before the forum update they were nice and automated just like you suggested but my best guess is that it broke somehow when we got the new servers for the forum.
And the foundation hero page titles have never been interactable in the first place, they are not that public either so I would just forget about it
With that being said I really do hope that you get that stuff figured out, have fun