Using filters in the segments on Google Analytics does not match with the total.
I am looking at the Audience in Google Analytics for the website, typically following metrics; - Users - Sessions - Pageviews
The website has 5 sub-directories and 2 of them have a big impact on traffic due to seasonality/event. Let's say those two pages are called "page A" and "page B". To observe a difference caused by the pages in these sub-directories, I created 3 different custom segments on GA, such as;
This is an exmaple of how I created a custom segment
I expected to see that the sum of filtered results (1+2+3) will match with the numbers I see in "Audience" (Total Users, Sessions, Pageviews). But the sum in all the metrics are about 5% smaller (e.g. the report says Pageviews is 2780 but the sum of 3 segments says 2110).
Can anyone help me understand why does this happen? Am I doing something wrong?
If segment 1 must include sessions with page A, it includes sessions with page A with/out page B. Vice-versa, if segment 2 must include sessions with page B, it includes sessions with/out page A.
You need the 2nd page exclusion in both, and 4 segments after all to get the sum:
