Incognito mode was just a theory. There are other ways the cache could be getting cleared, but that is your issue: The saves under "Saves" are tied to browser cache, and when that clears, your saves there go away.I don't use incognito mode though and I do try to use Export/Import, but I often forget and its annoying having to sift through potentially a dozen different saves when I only need 2 or 3.