All-in-all, you have to ask how this happened. Was it:
1) A mistake. Someone photoshopped the 360 buttons on the PS3 screens for fun and accidentally released it.
2) Purposeful.
1 is clearly crazy, so what made them do 2? Was it:
a) The 360 version did not look good enough?
b) The 360 version looked too good?
c) The 360 version was unavailable?
d) They were so keen to support their 'it'll be the same on all platforms stance' that they were willing to cheat?
e) Something else?
I'm kinda stunned that this happened, and that someone was stupid enough to allow this to happen. Poor show.