Playlist/mission loading problem

So I was in the middle of doing the legendary playlist for Halo 4. Got to composer and decided to call it quits. Saved and Quit out of the opening cutscene. Now when I try to resume the playlist, the game takes a little too long to bring up the loading screen, and when it does, it loads fairly fast. And then…boots me right back to the halo 4 playlist menu. I’ve had a similar issue on mission select a few times, but it’s never been an issue like it is here. I’d love to just hit restart mission and let the game reload the whole thing. But that isn’t an option, and I’m not redoing the last 6 missions in this playlist just to get it done. On Xbox btw.