I am not sure if you understood what i meant so will try again !!

If your phone has numbers stored in the phone memory it confuses the car kit because on most moden phones you can have 3 phone numbers under 1 name ie

IAN
HOME 902110
WORK 5196666
CELL 416888

Where on sim card
Ian H 902110
Ian W 519666
Ian C 416888

You must either delete numbers from phone or on some phone you have the option to use phone memory or sim card

Hope this helps