Hmm so i was just flipping through the 3rd bonus disc of behind the scenes and such of AT05, and i noticed in the rehearsal footage that the encore was originally different:
-Trauma
(this was replaced by STEP you but i assume it was only for the last few dates when the single was released)
-flower garden
-Humming 7/4
-Who...
(this was replaced by Replace, excuse the pun, which i assume was on all dates...)
and it also looks like there's an extra song after Boys & Girls, and i'm assuming it is "Replace" but i can't really tell.
here are the pictures of the setlist board in the rehearsal room:
