When you add your Google Analytics ID, please make sure that you only add the variable indicated in the Google Analytics code. It uses the format:
You can add your GA ID by going to your admin site, Settings > Store Settings> Configuration and scroll down to the bottom of the page under Options.
How can I see how much traffic is going to my website store?
To be sure I give you the best answer to this question, I will be referring this to our developers. I will let you know I hear from them.
In the meantime, hope this helps.