Save files deleted (bug?)
I originally started playing this game a couple weeks ago in online co-op with a friend (I never tried singleplayer). Everything was fine, finished 4 levels and I stopped playing it for a while. Started it back up tonight and played co-op with a different friend. This time, all of my save progress was deleted. We played through 2 levels and quit for the night.. and after I exited the game, I checked if my NEW saves in the save game folder were there.. but nope, they got wiped again. I'm not sure what happened, but now I'm paranoid this will keep happening. It's not a huge deal, as I originally only finished the first 4 levels, but it can be a much bigger problem if it happens frequently.
I'd like to know what may have caused this, thanks.