New contacts emerged without name

[dalil]

In my contact list a large number of contacts appeared. And they are all read only contacts.

All of a sudden a few whatsapp contacts in whatsapp dont show a name and theres no option to "save to contacts".
The options only show:

Share
Edit - If i choose this one i cant select anything on the screen to change.
View in address book - the same as edit if i try to edit through the address book.
Verify security code

How does this happen an how do i fix it..?

 

[UglyStuff]

Were you prompted by WhatsApp to merge your contacts with the Telephone.app or Contact.app. Maybe there's a setting in WhatsApp that does that automatically by default?