Add detection of duplicate page view tracking to Alerts

[9joshua]

At times a user can add script that will cause duplicate tracking of page view or other actions. This can happen, for example, when tracking script is added to GTM or if a Pageview Tag is added to a MTM container when the default tracking script is already tracking page views. It can be some time before the user realises they have tracked twice the number of page views.

Suggest a mechanism that can detect possible duplicate page view tracking as this is the most common type of duplicate tracking, and can cause a large impact on statistics. There could be an option in Alerts to notify users when this is detected.

Possible means for detection:

1. Pages that rarely have an odd number of page views per visitor
2. The number of unique page views is less than half that of overall page views for most pages