I have a sequence with one track of audio and I've Enhanced it. It's a talking head "template-based" project that uses one shot of the talent delivering one line to the camera so I'm reusing the opening and graphics by just duplicating the sequence and using REPLACE EDIT with new person so my color correction and framing stays the same.
When I do the a replace edit, the audio track gets replaced with the new one but the sound from the old audio track stills plays over the new one - even though there's just one audio track in the timeline.
The workaround is to option-click just the audio in the timeline and choose Render and Replace.