Unfortunately, Mini DV doesn’t have ‘locked audio’ like Mini DVCAM does. DVCAM locks the audio so it doesn’t drift. When I discovered this problem, I switched to using the DVCAM setting, but to work with footage already captured, I had to unlock the audio in the timelime, then bump it a few frames every minute or couple of minutes to get it to synch. Not sure how long your sequence is, if it’s not too long this could be a valid work around?
Hope this helps!