Audio Components

Final cut 10.2.3 I am editing a short film. I have External audio (Zoom H6) that recorded two lav's and and boom, and scratch audio from the camera (c100)
I am syncing the three external audio clips with the video clips using audio for synch. The new sync clip - in the inspector or the timeline only shows me two tracks. One track (Storyline Stereo) is the scratch audio and the second Connected Mono)is a combined track of external audio.

In time line when i expand the audio components i still only get the two tracks. I want to be able to edit all three use only boom or just one of the actors lav's etc. I have seen this done from a sync clip before. Not sure if it is something in the way it was recording if i a synching wrong or what.

Any suggestions would really help.
Thank BHS