Completed the Halo 2 LASO Playlist and it has not credited me the achievement. i have verified the files, i have waited for it to sync up. nothing. . Did it in 2 player CO-OP and the host was credited the achievement. This was done on the Steam version of MCC. the playlist says 15/15 but says i have done 0/9 playlists. is there a fix? i spent ages aiming for this achievement and it has well and truly annoyed me.