Wow.. that is the most bitch*ng and f*cked up thing to ever happen. I could think of three very realistic reasons.
-------------------REASON 1---------------------------------
An obsesive compulsive worker has got nothing to do.
So then he might've had fun with the 360 and scrubbed it off.
--------------------REASON 2--------------------------------
Humanoid probably says:
"Error! Error! 360 value to high. Must set value to normal quality."
Probably the humanoid worker Microsoft made must've malfunctioned.
-------------------REASON 3--------------------------------
HE HATED MASTERCHIEF AND SIGNATURES.