Hello G1ngur,
I spoke with Acorns about the profile issue and here's his response:
acornsn64 wrote: Anyway, I can't change Portal to reflect his profile, or unrelate the two, at this point. They both have valid claims to the name, and my system doesn't have a way to seperate them. Its something I can work on at some point... but likely no time soon. If he changes his name to something not in the Portal database it would instantly pick him up as a new player. But thats kind of a sucky compromise. And he'd have to guess a name not yet in the Portal db

Unfortunately, there's nothing that can be done on our end to change this.
Please let me know if you have any questions.