Big Team Battle requires Map Packs?

Well me and some friends wanted to play a bit of Reach, when one of them (who does not have the map packs) play it. It said he did not have the required map packs, so he left. Upon entering the playlist and come the voting phase, there was an Anniversary map. So what has happened? Is it some sort of glitch, or is it some bad March update thing?

Also, I’m glad to announce that my Map packs for Halo: Reach are almost a COMPLETE waste of money (i mainly play for achievements) all thanks to 343i. I can’t play the map packs on objective. It’s stupid. Slayer only and when people asked to have objective planted into the playlist, it was never.

I’m sure things will be fixed up, so i shall just wait int he meantime.

See here.