Hearing two audio tracks where only one exists

Hi everyone I have a rather interesting problem.  When I uploaded my storyline project to Articulate Online and then play it on several slides i hear two different sound tracks for the first 2-4 seconds of the slides. If I rewind the slide or move the slider back to the beginning I do not hear the two tracks. I did not have this problem when I previewed the presentation but only once it was uploaded to articulate online.

Any ideas?  I've already simply reposted the presentation but still the same results.

Thanks for your help.