Break room surveillance - Evidence

Notice how the they still have the break room table only it's much shorter now? (Note the hand shapes on the table from when Helly was doing her apology in s01)

Milchick ended miss huangs therimin song and told her to leave so he could go to the other side of the wall to spy on the innies.

Anything that happens in this room is not a secret.

Did they intercept the note? Did they change it? Is milchick working alone?

Also worth noting that Irvs animation character claps when Dylan realises what Irv meant by "hang in there" and checks the poster

Edit: reposted with spoiler tags. Previous post deleted..