The thing is, if you have ever had Steam cloud enabled and played the game at some point with it on a computer, there is likely a "world.teaw" in the copy of the Steam cloud on the disk. So if the "world.teaw" in the Steam cloud copy on the disk is a "broken" one, the game will still copy that one into the primary save directory if the "world.teaw" is not there (such as deleting it out of the primary save directory) even if Steam cloud is disabled for some odd reason. This was the issue with trying to delete the file in this thread:
viewtopic.php?f=42&t=49336Attached is all the Steam cloud options within its UI currently (a single checkbox for all games). There is no right-clicking on the game and going into its options to disable cloud saves for an individual game anymore.