Hello! Can anyone please shed some light into this-- confuses me how it happened. My phone's a Sony Ericsson and one time last year, I was able to iSync it successfully to back up my Contacts. Since then, of course some entries on the Contacts on that phone got updated, added etc. Yesterday, since I bought a new phone to replace my SE, I wanted to update the Contact copy on my Mac before I then copy it to the new Nokia phone. I synced the SE again to do this. It messed up the entries in both my Mac address book and SE phone Contacts. Entries whose old numbers were replaced by new ones since that one time I synced last year ended up with a second phone detail.The new numbers didn't replace the old ones, it became a second mobile number. Ex: Juan's old number was 1234 which was synced successfully last year. Yesterday, numbers listed for Juan were 1234 AND 5678 (new). Meaning, right now, for names with 2 numbers, I don't know which is the old or the new one, argh! To make matters worse, these double numbers got transferred to my SE phone as well! 1. The way I understood how iSync works, the new number (latest time stamp) should've replaced the old one? Why did it get ADDED, when it should've replaced? I was exploring the preferences and other submenus, but none indicated anything regarding direction of info transfer (mac to phone or phone to mac). What ended up happening, Address Book info and Phone contacts info were merged and were given a complete copy each, 2-way. Eeee. Why?? 2. Is there a setting I should fix before syncing in the future to make syncing one way? Phone to Mac only, not Mac to phone since I don't modify details on my Mac directly, but just use it as a back up. Many thanks for any help!