I never had any issues with my game save before, but after I downloaded 400 Days, it seems to think I've only just completed Episode 2. I went ahead and just played 400 Days because I was excited (hopefully this didn't mess things up, haha), but I noticed that it seems to think I saved Doug when I actually saved Carley. When I look on the stats page for episode 2, it says I saved Carley. I attempted to start Episode 3 (a popup about save data came up, I think, that I just clicked cancel on), but the screen was black and I exited quickly because I was worried about messing something up.
I'm using Windows 7 and I run the game on Steam.