title: GA - Inconsistencies in Total Number of Users and New Users
body: <p>I have two puzzling cases in GA which I hope someone can enlighten me on.</p>
  
  <p>1) Under <strong>Audience</strong>-><strong>Overview</strong>, why does the figure under <strong>All Users</strong> (Fig 1) changes when a new segment is added to the report (Fig 2)?  </p>
  
  <p><a href="https://i.stack.imgur.com/yedKf.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/yedKf.png" alt="enter image description here"></a>
  <strong>(Fig 1)</strong></p>
  
  <p><a href="https://i.stack.imgur.com/P6b3n.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/P6b3n.png" alt="Fig 2"></a>
  <strong>(Fig 2)</strong></p>
  
  <p>The new segment does not have to be new/returning visitor; the <strong>All Users</strong> figure changes on other segments as well. Note that the <strong>Sessions</strong> and <strong>Pageviews</strong> under the All Users segment do not change (correctly I believe).  </p>
  
  <p>Is this a bug in GA?</p>
  
  <p>2) Using the same report with additional segments, why is the <strong>Number of New Users</strong> different from the <strong>Number of Sessions by New Users</strong> (Fig 3)?  </p>
  
  <p><a href="https://i.stack.imgur.com/cwsXS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cwsXS.png" alt="Fig 3"></a>
  (<strong>Fig 3)</strong></p>
  
  <p><a href="https://www.e-nor.com/blog/google-analytics/google-analytics-new-labels-mystery-of-the-returning-visitors" rel="nofollow noreferrer">As explained by this post</a>, a new user who visits the site a second time will be counted as a returning visitor, so his second and succeeding sessions should now be counted as sessions being done by a returning visitor. </p>
  
  <p>Doesn't this mean that the number of new users should be the same as the number of sessions done by new users? Are there exceptions (perhaps using a different browser or device) that will skew the results?</p>
  
  <p>Thanks</p>