Incorrect duplicate email warning on Contacts card

Incorrect duplicate email warning on Contacts card

This is also a problem related to my former new editing layout post.
Multi Select list behaviour on the "Ticket Edit" mode

The incorrect duplicate email warning makes it impossible to record new contacts. This one has to be solved immediately.

I've searched all of the contact cards on the "all departments" setting but the only one found is the one that I'm already editing. This is not the first time that I've encountered this problem.

I'm able to edit the records by first recording the "Account Name" and saving my edit and then editing the "First Name" and "Last Name" fields on the record.