So I have two discrepancies in GA user counts that I am trying to understand.
The first is that my user count for a subset of the site's lifetime is greater than the entire sites lifetime.
Concretely: over the lifetime of the site it has had 872 users:
However, if we just look at the data after marketing dropped, we get 996 users, even though this is just a subset of the previous data.
How is this possible?
Secondly, the way I understand it, new users over the life time of the site should == users over the lifetime of the site, right?
Why then do I get only 720 new users over the lifetime of the site?