Infection. I get matched with everyone with Noble MP.

Everyone has Noble MP. Here are the options

Alpha Zombies
POWERHOUSE
Alpha Zombies
COUNTDOWN
Infection
ANCHOR 9

Because it was infection on a9, they chose powerhouse. Oh, god, I have never played a DLC map on infection ever. Just cause it was out of sight (bottom selection, even I couldn’t see it until too late) and not alpha zombies, I missed it. I rage quieted so hard, I didn’t touch my xbox for two days. Why 343, WHY?

Don’t feel bad. I have had Anchor 9 actually chosen for a Living Dead match… and everyone got disconnected before it even began.

Proof: http://www.bungie.net/stats/reach/gamestats.aspx?gameid=861114039&player=Veluxier

Try deleting NMP and AMP, then you only have DMP to match with.