The Contacts app uses an intelligent merge feature to combine contact info from various sources (Gmail, Microsoft® Exchange, Facebook, new entries, etc.). If contact info was joined in error, the info can be separated back into individual contacts.
From a Home screen, swipe up or down from the center of the display to access the apps screen.
Tap Contacts .
Select a contact.
Tap the Menu icon (upper-right, to the right of Share).
Do one of the following:
To link a contact:
Tap Link contacts.
Select the contact(s) to link.
Selected when a check mark is present.
Tap LINK (upper-right).
To unlink a contact:
Tap Manage linked contacts.
Tap UNLINK located to the right of the contact(s).
Tap the left arrow icon < (upper-left) to return to the previous screen.