It just doesn't sync properly. If you delete a message on your phone, it will remain on the computer.
When all devices are using iCloud, it's nice. You can have the app open on your phone and computer, delete a message or message thread on either and it will instantly vanish from the other device. What I did run into was it frequently didn't sync properly if a device wasn't on or offline. Glitches like that are no doubt one of the (many) reasons why it's not released yet.
When all devices are using iCloud, it's nice. You can have the app open on your phone and computer, delete a message or message thread on either and it will instantly vanish from the other device. What I did run into was it frequently didn't sync properly if a device wasn't on or offline. Glitches like that are no doubt one of the (many) reasons why it's not released yet.