To follow on from my comments, you want to put any user-specific settings (i.e. 1:1 relationship ) into the user table and not the claims table. That would apply to your profile settings
The claims table is per external claim. Although claims may contain duplicate values, they allow for the values (even name) to vary from site to site. It is after all only the value the user stated when they signed up to the external website.
There is also the facility to add additional separate tables, that relate to the user table, but probably not worth the extra effort for profile data.
*Note: there appear to be problems using database-first with asp.net identity, so you will likely need to make model-first changes and use database migration to update your database (which we wound up doing)