I've only had my new tablet a few days and just noticed that while it was set to sync to the network, the timezone was incorrect. I fixed it which borked things once again. I'm hoping that was root cause in all of this, but I'm not so sure since my tablet was in a further ahead timezone that was the file that was written over both times. Anyhow, it seems that twice now, I've jumped back in time on my main Adventure playthrough. I also might be going back and forth between devices too quickly. How often do you have it set to autosync?
I'm fine to hobble along this way until the patch comes out. I had terrible luck replaying the scenario that I had just finished and subsequently ran out of time and had to restart from scratch. What's kind of funny though is that the end scenario (when I did finish successfully the second time) had a reward of random items. Each of my characters got the exact same item as my first successful attempt. There must be a stored hash or something.