Audio changes not carrying over in a duplicated project

Hi guys

Wondering if anybody else has this issue.

Whenever I duplicate a project my audio work that I've done doesn't carry over. Its only the work that I do when I expand the audio clip. So for instance if I have a few lapel mics in a clip I expand the audio clip, adjust the volumes of each mic, maybe extend some mics over the top of other clips and use a short fade and then collapse the audio clip again. Now if I go and duplicate my project as a snapshot all that audio work I've done on the individual channels doesn't carry across. I only ever have this problem when I'm doing work within an expanded audio clip. If I globally raise the level on the audio track containing all the mics that then carries across with no issue.

Anybody having the same problem?

Cheers
Gav