Match Cross Reference Fails

I'm getting some unexpected behavior with cross attribute matching. I'm trying to match the records in the attached image. The record on the left is in the matchgrid. I'm creating a rule to get a match for the record on the right.My rule has * an exact match on last name (required)

• exact match on preferred first name
• exact match preferred first name cross check first name

I'm getting a new ref ID assigned when I enter the record. Ideas about what is going on?