This discussion may contain spoilers!
Finished episode 1 the other day. My wife got her own version a few days after I did and wasn't ready to finish until today. But when she went to the idols to finish one of them didn't work, even though she did the same thing I did.
So I went back to my finished game and loaded it to see if perhaps her inventory needed work. I was surprised to discovered I suddenly hadn't finished! I was back in town. If you finished a day or two ago, you may need to go back, too. (Spoiler follows)
It involved the cheesehead. When I went through the first time, the cheese head was accepted in the Strange Idol with no problem. I inserted the cheese, dialed to the correct mouth and nose, and triggered the clam. I then went to the Messed Up Idol and finished the game.
This time it didn't work. It took me an hour to realize I had to first do something else with the cheesehead before the idol would trigger. Something I didn't have to do the other day