I picked up Man of the People, Pick a new face, Train wreck and Good Fellas cheeves yesterday right after I downloaded it. For some odd reason, I played chapter 9 first. My dashboard list only had 1000 listed, but I just popped in the game, and popped it back out, and now it's reading 1250. They're not reading on xbox live but I've gott'm, it's on my gamerscore, so that's good for me.
For MotP, I just saved everybody and it popped... can't verify 100% when, but I know I got it.