Home page doesn't display configured categories

All the categories provide some superset of fields asked in the last years by customers. They are pre-created for convenience, so you don't need to add a field as custom field in case you need it. These fields don't need to be filled. If you don't need it, leave it empty or just delete it.

However, in case of the SSN, you seem to have a slight misunderstanding. There is the first field "Name", where you are supposed to enter a title, something like "SSN for Tertius3" in my case. The field below, labeled "Number" is for the actual SSN. It has a field type of "password", so it is displayed as ****** instead of clear text, like a password, so it cannot just be peeked.