The Contacts app uses an intelligent merge feature to combine contact info from various sources (GmailTM, Microsoft® Exchange, Facebook®, new entries, etc.). If contact info was joined in error it can be separated back into individual contacts.
From a Home screen, tap Contacts (located at the bottom).
If unavailable, navigate: Apps > Contacts.
These instructions apply to Standard mode only.
Tap a contact then tap Details .
Tap the Menu icon (located in the upper-right).
Adjust as desired:
To link to another contact:
Tap Link contacts.
Select the contact to link to from your contact list.
Tap Link (located in the upper-right)
Tap Manage linked contacts.
Tap the Minus symbol (-) next to the contact to unlink.