5.4.2 Issues with clips being muted

I am using a virb ultra 30 up front and virb elite as rear camera. Ultra 30 has microphone turned on and all source files from camera play audio. But when creating video through virb edit, some clips get muted while others do not. The volume for all clips shows 100%, but I can't do anything to get the audio to come through. I have a feeling it has something to do with multicam and that it is maybe mixing up the audio track between the front and rear camera. I do have the rear camera mic turned off. I have tried filipping the audio source in the multicam settings, but all tracks are muted (possibly set to rear cam). So what I end up with is a video that has audio for 10 minutes, then no audio for 10 mins, then audio again.