The JCF uses vBulletin, a forum system created by a third party. It's very versatile, but it does have its limits with regards to user profiles and such. Unfortunately we don't really have the time or resources to implement such functionality by ourselves.

The JCF and J2O's accounts can't be linked either for various reasons. It's two separate login systems that are pretty much impossible to integrate, and there's lots of people with a J2O account but no JCF account, or vice versa. It's not possible to automatically link those that have an account on both, and doing it all by hand is too time-consuming.