Multicam going out of sync in new sequence

Hi all, 

Really frustrating issue here.

I am creating a multicam sequence that has 3 cameras and 1 microphone, after I create the multicam I align my audio to match exactly and it sounds great. However, when I right click my multicam and go create new sequence from clip, the sequence adds 9 new blank audio tracks and the audio is now out of sync. I can't work out to fix it.

Any suggestions?