Do you have same experience before you have your card?

Dear friends, anyone know what this is about? Last week I made a service request for all my three family members to USCIS. to my surprise, today I received a letter from USCIS which told me that my wife's card is in production and will be mailed to her in 60 days. I am the main petitioner, but I have not received any thing, neither my daughter. Have you any idea what is about? thanks a lot in advance!