On my Android phone, the app Simpletask Cloudless, a todo.txt client, was connected to the issue, so I checked to see if that app was doing something absurd like setting todo.txt and done.txt as recently modified just for looking at it. So after making sure that every device had the same base todo.txt, I made a filler task on my work computer to get destroyed in the sync process, which meant its todo.txt was modified and was officially the newest version. My laptop was nearby and received it fine. I then opened Simpletask on my phone before they were re-synchronized. I then left it and went to Sync, and it did its work. The newer todo.txt got overwritten. So at that point it could have been Simpletask or Sync. I killed Simpletask, then made another task on my work computer, rendering todo.txt newer once more. The laptop received it again just fine. I opened Sync on my phone again without touching Simpletask. It was overwritten again. So this isn't Simpletask; this is entirely Sync's fault. Problem is, there's no option to get debug logs on android, so I have no way of knowing why the android version insists that its files are the newest versions. But then my workstation randomly did it too one day. I don't have a debug log; debug logging wasn't enabled at the time that it happened, and I haven't reproduced it since. I'm not sure how to reproduce the conditions under which it happened, because it seemed like everything was going well until then. I feel with my workstation in particular, it may be connected to a separate issue I'm having; on my workstation, which I just leave on forever, BTSync just straight up freezes up after I leave it on long enough. So I have to kill -9 it. I actually have a thing in my crontab that kills and restarts it because I know it's always going to freeze up. I have the android version set to auto-sleep to save battery, so I wonder if these issues are connected. I'm guessing that when they wake up they're all like "HEY I HAVE THESE FILES WHO WANTS THEM COOL HERE" and don't really care about whether or not their files are actually the newest ones or not. I don't know if it's relevant, but the todo.txt folder is part of a nested share on the desktops; There's ~/Documents that gets synced, and ~/Documents/todo that also gets synced, but it is only a separate share because Simpletask Cloudless doesn't let you choose a folder. Between the data integrity issues and the freezing issue, both of which I'm not sure how to track down, I don't think I trust BTSync anymore. It used to give me everything I needed too. :/