Cannot view UTM data on google analytics, is that a SS problem or a GA problem?

Hi 

I am a new user to squarespace and also to UTM tracking. I am attempting to use google analytics to collect UTM data from hits to my webpage, here is the link I am testing:

http://sciencesplained.com/?utm_source=newsletter&utm_medium=email&utm_campaign=experiment

I can see connections (In realtime on Google Analytics) from various devices when I connect with this link from numerous devices. Including those I know do not have any cookie blockers etc. However the infor from the UTM is not available at all.

On squarespace I followed the instruction here

https://support.squarespace.com/hc/en-us/articles/205815608-Using-Google-Analytics-with-Squarespace?platform=v6&websiteId=664e16d47b985c4b43396005

to the letter.

Is there anything on the SquareSpace platform I should additionally do to make this work or is the issue most likely with my Google Analytics set up?

Thanks in advance for answers

Adam