I just got Halo 3: ODST and I was doing some back tracking after finding out the locations of the audio logs thanks to this map: http://www.playhaven.com/guides/360/halo-3-odst/audio-log-locations-guide/M4ruT8l6EWfY/#block_4 well anyway, I went to get the one marked 2 on the map and I found the spot its supposed to be and it's not there, I even started a new game and the other logs were where they were supposed to be but 2 is still missing. Is there something else I have to do first?