World Syncing Gone Wrong

So recently, I’ve been grinding on MC on my world called “Flaco,” which is on my Xbox One S. However, earlier today, I logged into my other Xbox One and my world synced to when I was there about a month ago, whereas I was supposed to be someplace else with different items. I checked my world out and some of my things were missing and others were still there. My creations just got destroyed, including my items in my chests. I was wondering what had happened and was upset about the situation for how much effort was put in. P.S. Under this are some screenshots of what I had already completed, but were eventually destroyed.