The Contacts app uses an intelligent merge feature to combine contact info from various sources (Gmail™, Microsoft® Exchange, new entries, etc.). If contact info was joined in error, it can be separated back into individual contacts.
From a Home screen, navigate: Apps icon > Contacts .
Tap a contact.
Tap the Menu icon (located in the upper-right).
Tap the Link contacts icon (located at the top).
Tap the checkbox to the right of the contacts to link.
Selected when a check mark is present.
Tap the Save icon (located in the upper-right).
To unlink a contact, tap the linked contact.
Tap the Contact linked icon (located to the right of the contact), the icon changes to the Contact unlinked icon .