The option "display it publicly" keeps appear

HI,

I have some problem while using Profile Privacy. I have 2 sets of regristration form for 2 types of users (eg. ROLES A and ROLES B). For example: I have a field "contact number" for both sets of registration from and I have enabled "Allow user to over ride default visibility" for both of these fields.

When I try to sign up as ROLES A, the option, "display it publicly" appear twice. Even though the registration form of ROLES B didn't appear but the option to display contact number publicly for ROLES B appears.

After registration, all the options, "Display it publicly", for ROLES B can be found in "My Account" too.

How shall I fix the problem?
Could you provide some advice for me?

Thank you.