I play Isaac on both my gaming desktop and my Macbook. They used to be in sync and loading the same game saves. However, now they are completely out of sync.

Both of them upload to cloud sync, and upload to cloud is enabled. It tells me they are in sync.

However, my Macbook game saves are really old and my desktop is the latest. I tried deleting steam (both uninstalling from Applications, and also deleting /Library/Application Support/Steam) on my Macbook and reinstalling. It would pull data from cloud sync again but it is the SAME OLD MACBOOK GAME SAVES! It feels like cloud sync is keeping 2 separate game saves per device and not share!

Does cloud sync save different game files per device or something? How do I force it to only sync to single version and share?