Seeing this makes me think that the game needs an "evidence checklist" that can tell you if you're missing pieces by the time you get to the final day and if you have to restart. Sounds like OP got to the last day, saved, and tried every option not knowing that he was locked out of the real ending. Be nice if the game gave a hint that said "No you missed something a long time ago. Get ready to use that 'skip' button."