Ghost Audio

I have a piece of audio (from slide 4) that is playing at slide 2 or slide 1 automatically, overdubbed with the correct audio.

I've tried the following:
remove and add back ALL audio
repost with different articulate online name
publish to cd
'save as' ppt file w/ ppta
rename ppta file and add back audio, quiz & engage
re-sync slide 4 (108 items on it)

I just can't seem to get rid of this 'ghost' audio! Can you help??!!

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