Tests here used the version that you are using, but you can re-download and over-install simply by clicking the link above.
The audio in the linked sample is clean. What you are hearing is the two sources very slightly out of sync - confirming that both are being heard during the test. Text is not shifted from the audio in the export...
The first text begins to fade up at :22 in both VP and the export. The last text fades out at 4:33 in both, so the titles are not offset. The mp4/H264/15fps export was made at the 'auto-match' suggested resolution of 1800x1272, which resulted in a 21MB file.
This hints at a local issue. You might test the export on another PC, if available. Sorry that the oddity couldn't be replicated here.