Hi Lisa,
Had a discussion with Microsoft support team last week about this issue .
They suggested that do not use the both options go for single one like whether Smart Matching or Tracking Token.
So in my case I need the tracking token. So I have unchecked the check box use Smart Matching options.
As it is random issue for me , so I am monitoring whether it is creating the duplicate tracking or not.
Regards,
Priya.