Is it just me or does anyoone else not able to get a last audio log? Mine is from the founder lady and I have played through the campaign at least 2.5 to 3 times on diffefernt difficulties and i cant find it. If anyone can help please do

Just keep playing thats all I did and before I knew it I got all of them without realizing I recieved an achievement.

got 5 to go dont forget about freeplay and the chalenges.