We use Google Tag Manager (GTM) to send pageviews and other data to Google Analytics. I'm currently cleaning up our GTM container to make sure the data is getting sent accurately. I'm running into an issue that even though I only have one pageview tag firing, sometimes (it's not every time) I see two records for the same pageview (even though I know I only viewed the page once in testing). One pageview record has hostname "www.mysite.com" and the other pageview record has the hostname "mysite.com". Has anyone else had this issue and can give me a hint as to why this might be happening?