Share Emails All checkbox not retaining setting

Share Emails All checkbox not retaining setting

Two questions.

1.  When I set Share Emails according to the attached screen, it does not retain the setting when I return to the record.

2.  I want to Share Emails - All to be enabled by default for all my contacts (especially because I will soon do the major import of contacts from my old CRM.  Can this be set globally for all Contacts?