I logged into another Xbox where the cloud save did not save and the local save saved instead. I lost 2 weeks of data.

I had a save on my main Xbox and when I went to my other Xbox to play there the save wasn't there. I tried to get it to sync and it didn't. It was an old version of the world. Then I went back to my main Xbox and the old save from the other Xbox was there. I couldn't get the most recent save and I lost at least 15 hours of work.