Ruby Quest/Headscratchers

• This troper has been over Ruby Quest multiple time and most all of the loose ends seem to tie up one way or another, but there's still one thing I don't understand... If Ruby and Tom have been through the facility at least three times... WHY HASN'T TOM ALREADY GLEEFULLY FUCKED THE SHIT OUT OF EVERYTHING BEFORE??!!
• Spoiler for the ending: If Tom was actually #6 rather than #5, then why when he saw the note about not trusting #7 (Ruby) in #5's locker (which would be Tom Nook's) did he identify it as his own handwriting? Shouldn't it be in Tom Nook's handwriting instead?
  • It was his. My guess is that in a previous loop, Tom had just discovered Ruby's past life treachery and the fact that they kept doing the same things again and again, and, assuming he was subject 5, wrote a message to himself in future loops out of fear and anger so that his future self wouldn't trust the supposedly-backstabbing Ruby, and never had the chance to erase the message once he and Ruby were getting along again, if they even got along again at all.
    • But that's the part I don't understand, the file we see in the ending sequence suggests that Tom was subject 6, not subject 5 like we had been led to believe. So shouldn't he have been locked up in a different locker instead?
    • But he didn't know he was Subject 6 at that point. He thought he was #5. So when he wrote the note, he put it in Subject 5's locker.
    • Oh... I think I get it now. Thanks. :)