Smart groups misses contacts
I am working with OS 10.9.5.
Working with Contacts, I am trying to find out which cards are NOT in a particular group, so that I can look through them and add the ones I want.
I made a new Smart Group and chose Card > Is not a member of > "group name" and it returned 103 cards.
Problem is, in my Contacts, I have 2,360 cards total. In the group in question, there are 476 cards. Thus, that new smart group should have 1,884 cards.
Why are there only 103 cards found?
Marc
MacBook Pro, OS X Mavericks (10.9.5)