Oh, wow, that's not supposed to happen!
After a lot of time going through the code, I discovered an additional "+" that prevented the ending from triggering. I also tested the game again and you are correct, there is some bug in there... although I have no idea what it is, because everything seems okay in the code.
Normally the ending is supposed to trigger around the 10th day.
I will try to look for the error, but I appreciate you for playing the game so much! :D