This Game Is Broken!

So I was playing the mission Uprising when I stumbled upon the terminal. However, when I went to go watch it on Halo: Channel, it took me right back to Halo: 2 Anniversary. I tried everything I could, but then when I tried to save and quit to see if that would work, it took me right back to the start of the mission. This has has happened to me about 5 times now on other missions, and even though I have the achievement for Uprising’s terminal, it won’t let me watch it on Halo: Channel. There are so many problemswith this game. Why did they release it when it seems to be broken as hell!?